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A: Click here.
A: What other information do you need on Megaraptor.
A: The hadrosaurs (duck-billed dinosaurs) were a large group of ornithischian dinosaurs. Some hadrosaurs include Maiasaura, Iguanodon, Edmontosaurus, Lambeosaurus, etc. For more information and pictures of hadrosaurs, click here.
A: Theropods (which means (means "beast-footed") were the meat-eating dinosaurs. For more information on theropods, click here.
A: Yangchuanosuarus weighed roughly 5200 pounds (2350 kg). It was was up to 33 feet long (10 m) For more information about Yangchuanosuarus, click here.
A: That isn't known.
A: It is a scenario in which a seismicly-active world has excess carbon dioxide in the atmosphere (spewed out of the volcanoes) which causes a heat build-up (the greenhouse effect).
A: Warmer.
A: I answered a question about Dilophosaurus from Australia a while back (also, I answer many questions every day). Your ISP may be caching files (storing files so it doesn't have to retrieve them again, so you get outdated versions and they save bandwidth costs). I can't do anthing about that. Also, how can you not remember your name?
A: Deinonychus fossils have been found in Montana, Utah, and Wyoming, USA. For more information on Deinonychus, click here.
A: The Turritellidae are a family of snails (also called Screw snails and Auger snails) that live on the sea floor and eat plant detritus. These gastropods have a long, conical, spiral shell and a circular aperture. They evolved during the Permian period. The genus Turatella was named by Lamark in 1799 and has hundreds of living species.
A: It changes the meaning. The name with the "us" at the end indicates the individual genus; the name without the "us" usually indicates a larger group. For example, Stegosaurus refers to all the species within the genus Stegosaurus; stegosaur (or stegosaurid or stegosauria) refers to all the stegosaurs, like Stegosaurus, Kentrosaurus, etc.
A: The Jurassic period was when most of the huge sauropods lived.
A: Oviraptor's name means "Egg theif." It was originally thought to be an egg theif, but was later found to be among its own eggs. For more information on Oviraptor, click here.
A: Other stegosaurids (relatives of Stegosaurus) include Kentrosaurus, Dravidosaurus, Dacentrurus, Chialingosaurus, Chungkingosaurus, Craterosaurus, Lexovisaurus, Monkonosaurus, Regnosaurus, Tuojiangosaurus, Wuerhosaurus, Yingshanosaurus, and many others.
Q: Was T-Rex a scavenger or
a predator? Do you have any information that would help me? Thank
you!!
from Craig W.,
Holmdel,
New Jersey,
United States;
May 30, 2000
A: Most paleontologists think T. rex was a hunter, but Jack Horner (and others) think he was primarily a scavenger. For more on this debate, click here.
A: Some of the obvious adaptations of the Woolly Mammoth to its cold, snowy environment were is long hair (which insulated its body and kept it warm), its long tusks (which it used to get food through the snow and ice, and also may have been used as protection), its small ears (which minimixed heat loss), and its relatively large size (which also minimized heat loss). For more information on the Woolly Mammoth, click here.
A: Velociraptor was about 6 feet long. For more information on Velociraptor, click here.
A: The Jurassic period went from 206 million to 144 million years ago. For a list of early Jurassic dinosaurs, click here (click on the links at the top of that page for middle and late Jurassic dinosaurs. For a list of Jurassic period printouts, click here. For Jurassic period plants, click here.
A: Giganotosaurus and Carcharodontosaurus were slightly bigger than T. rex.
A: Stegosaurus (which was about 30 ft long) had a brain the size of a walnut. For more information on Stegosaurus, click here.
A: Only dinosaur footsteps have been found in Pennsylvania. For a list of dinosaurs listed state by state, click here.
A: Chasmosaurus was a ceratopsian dinosaur; it was a three horned, plant-eating, frilled ceratopsian dinosaur that lived late in the late Cretaceous period, about 76 to 70 million years ago. It was 16-26 feet (5-8 m) long and weighed about 3.5 tons (3220 kg)s. For more information on Chasmosaurus, click here.
A: Thecodonts were socket-toothed reptiles, Triassic period archosaurs that mat have been the ancestors of dinosaurs, birds, pterosaurs, and crocodilians. The archosaurs are divided into the thecodonts, crocodylians, pterosaurs, and dinosaur (plus birds).
A: Diplodocus had the longest tail. It was up to 43 feet (13 m) long.
A: (pronounced GOH-yoh-SEF-ah-lee ) Goyocephale (meaning "elegant or decorated head") was a thick-skulled, flat-headed, plant-eating dinosaur with knobs and spikes on its pitted skull and large teeth. It dates from the late Cretaceous period, about 85 to 80 million years ago. This homalocephalid pachycephalosaur was found in Mongolia (the skull and parts of the skeleton were found). Goyocephale was named by Perle, Maryanska and Osmolska in 1982. The type species is G. lattimore.
A: A paleontologist is a scientist who studies paleontology, the forms of life that existed in former geologic periods, chiefly by studying fossils. "Paleo" means old or ancient. "Ontology" is the study of existence ("onto-" means existence, "-logy" is the study of something). This "-ist" at the end means a person who is involved in the field.
A: Only a two horn cores and a single bone have been found, but they were similar to those of Chasmosaurus - most of the features in this drawing are good guesses. For more information on Ceratops, click here.
A: Eoraptor was probably a side branch of the cladistic dinosaur tree, but its close ancestors may have given rise to many theropods (but the ornithischians evolved from another branch entirely). The oldest-known dinosaurs so far are two 230 million year old prosauropods from Madagascar, which may have (or their ancestors may have) given rise to sauropods. You can look at characteristics of these early dinosaurs and trace the development (evolution) of these characteristics (like tooth structure, hip structure, leg length, number of digits, etc.) in later models. For a list of early dinosaurs, click here.
A: The oldest-known dinosaurs so far are two 230 million year old prosauropods from Madagascar.
A: Oviraptor was about 6 to 8 feet long (1.8 to 2.5 m) and weighed roughly 55 to 76 pounds (25 to 35 kg). It was a fast, agile dinosaur, perhaps running about as quickly as an ostrich, which can run up to 43 mph (70 kph). For more information on Oviraptor, click here.
A: No dinosaur fossils have been foun in Florida; it was under water uring the time of the dinosaurs (when the sea level was higher than it is now.
A: There are almost 5,000 different species of crabs, and thier diets vary extensively. Many crabs are omnivores (plant- and meat-eaters), others are carnivores (meat-eaters), and some are herbivores (plant-eaters). For more information on crabs, click here.
A: The Earth would be incredibly crowded and diverse!. Paleontologists estimate that over 99% of the species that ever lived have gone extinct. That means that if all the extinct creatures were still alive, there might be well over 1,000 times as many species of organisms on the Earth.
A: I haven't seen the movie yet.. I'll post your question in the Dino Talk page - a lot of the kids there have seen the movie.
A: Click here.
A: No, there were no fruits during the Jurassic period because flowering plants hadn't evolved yet. There weren't any grasses either. For a page on Jurassic period plants, click here.
A: Yes, dinosaurs were reptiles.
A: Many dinosaurs had horns on their heads, including many ceratopsians (like Triceratops, Pentaceratops, Styracosaurus, Zuniceratops, Chasmosaurus, Monoclonius, Torosaurus, etc.) and a few theropods (like Carnotaurus, Ceratosaurus).
Q: can u give me a good
list of places to find leaellynasaura on the internet and/or
books
A: Click here.
A: No fossilized Muttaburrasaurus babies or nests have been found, so nothing is known about this topic. For more information on Muttaburrasaurus, click here.
A: Probably not. It used to be thought hat they did, but paleontologists now think that what they thought was a second brain was just an enlargement in the spinal cord in the hip area. This enlargement was larger than the animal's tiny brain..
A: For a list of Triassic dinosaurs, click here. For a list of Triassic printouts, click here.
For a list of Jurassic dinosaurs, click here. For a list of Jurassic printouts, click here.
For information on Velociraptor, click here. What other information on Velociraptor did you need?
A: During the Jurassic period the environment varied from place to place. Some places were wet, others were dry, some were very warm, some were colder. On the whole, the Jurassic was warmer than it is now. As for plants, flowering plants hadn't evolved yet, so many of the plants that dominate the Earth today (like grasses) weren't around. For a page on Jurassic period plants, click here.
A: Astrodon (meaning "star-tooth") was a long-necked plant-eating dinosaur, a brachiosaurid sauropod that was about 30? feet (9 m) long (which is small for a brachiosaurid). It lived during the early Cretaceous period, about 130 million-120 million years ago. Astrodon is known only from fossilized teeth found in Maryland, USA (Astrodon is the state dinosaur of Maryland). Astrodon was named by Johnston in 1859. The type species is A. johnstoni. Astrodon may be the same as Pleurocoelus.
A: That's true, no dinosaurs flew. There were flying reptiles that lived during the time of the dinosaurs, called pterosaurs. Some pterosaurs included Pteranodon, Pterodactylus, Rhamphorhynchus, and Quetzalcoatlus.
A: I've never heard of Dinosaurius. Dinosaurus, however, was a large, plant-eating dinosaur (a plateosaurid prosauropod ) that lived during the late Triassic period in what is now Europe. Dinosaurus was named by Ruetimeyer in 1856. Dinosaurus (later Gresslyosaurus) is probably the same as the genus Plateosaurus.
A: It was probably an adaptation to get food. Some dinosaurs, like Brachiosaurus, had a giraffe-like stance, and they likely used their neck to reach leaves high in trees. Others, like Diplodocus, couldn't lift their necks high, but may have used their neck to reach into water to get soft aquaic plants or into thickly-forested areas.
A: Yes, many dinosaurs were bigger than T. rex. Two other meat-eaters were slightly taller than T. rex (Carcharodontosaurus and Giganotosaurus). Many plant-eaters (like Argentinosaurus, Diplodocus, Seismosaurus, and Brachiosaurus) were MUCH bigger than T. rex.
A: Click here for the first dinosaur discoveries.
A: Tyrannosaurus rex was a type of tyrannosaur (also called tyrannosaurids). Tyrannosaurids were meat-eating dinosaurs (theropods) with two-fingered hands, small arms, a large head, sharp teeth, and lond, powerful hind legs. They lived during the late Cretaceous period. Other tyrannosaurids included Albertosaurus, Alectrosaurus, Alioramus, Chingkankousaurus, Daspletosaurus, Gorgosaurus, Nanotyrannus, Prodeinodon, Tarbosaurus, and T. rex.
A: Paleontologists think that Stegosaurus' plates were arranged in two rows running along the back and upper portion of the tail. Since the plates weren't attached to the vertebrae, the positioning of the plates is not entirely certain.
A: Diffeent dinosaurs probably made very different sounds - some may not have made sounds. One dinosaur, Parasaurolophus, had a large, resonating hollow bony crest on its head, and paleontologists think that it was used to make a low, trombone-like sound.
A: About a thousand genera have been found, but many, many more existed.
A: Cetiosaurus means "whale lizard." For more information on Cetiosaurus, click here.
A: Click here.
A: Dimetrodon (not a dinosaur, but a pelycosaur) lived during the Permian period (about 280 million year ago) . For more information on Dimetrodon, click here.
A: Click here.
A: Dilophosaurus means "Double-crested Lizard." For more information on Dilophosaurus, click here.
A: Click here for information on Diplodocus.
A: Parasaurolophus means "Beside Saurolophus)" and Saurolophus means "Crested Lizard." For more information on Parasaurolophus, click here.
A: (pronounced HIS-tree-ah-SAWR-us) Histriasaurus (meaning "Istrian lizard," for the Istrian peninsula of northwest Croatia, on the Adriatic Coast) was a large plant-eating dinosaur that lived during the early Cretaceous period (from the late Hauterivian to early Barremian, about 126-125 million years ago). Histriasaurus was a diplodocimorpha, a long-necked, whip-tailed giant that walked on four columnar legs. It had peg-like teeth and high vertebral spines. It may have had a sail on its back. Fossils of this sauropod were found in Croatia. The type species is H. boscarollii, named for Dario Boscarolli, who discovered the fossil site. Histriasaurus was named by Dalla Vecchia in 1998. It is probably closely related to, but more primitive than Rebbachisaurus.
A: No dinosaurs have been found in Pennsylvania. For a page on fossil collecting in Pennsylvania, click here.
A: Click here.
A: Click here.
A: Lots of diniosaurs were found in 1988, including a relatively complete Herrerasaurus (Sereno). The year when a dinosaur is named is recorded and readily available in references. The year that a fossil was found (and even who actually discovered the fossil) is not always easy to find. Lots of dinosaurs were named in 1988 (the dinosaur fossils had been found earlier), including Aeolosaurus, Anserimimus, Cathetosaurus,
Chassternbergia, Denversaurus, Giraffatitan, Hironosaurus, Kagasaurus, Kotasaurus, Nanotyrannus, Orodromeus, Protognathus, and Stenotholus.
A: An herbivore or primary comsumer,
A: The dinosaurs lived in a wide variety of environments, from deserts to wet areas.
A: No one knows what color any of the dinosars were.
A: A hadrosaur (duck-billed dinosaur) has been found in Minnesota. For more dinosaur finds listed by state, click here.
A: Sor far, the oldest ones are about 230 million years old.
A: The last of the dinosaurs went extinct 65 million years ago, during the K-T extinction.
A: That's certainly an astute observation, but there's no way to know about the claws - plus, I don't think that the dating of the rock layers has been done by radioisotope analysis, and so is a bit hazy. Many paleontologists think that the saurischians branched off before the ornithischians (for example see The Evolution and Extinction of the Dinosaurs by Fastovsky and Weishample), although this may be because of Eoraptor. As to Pisanosaurus (the earliest ornithischian that is relatively well-known, dating from the late Triassic, roughly 220 million years ago), it is generally placed outside the heterodontosaurids, although it was once thought that it belonged to that group.
I think that it would be an amazing coincidence if the oldest dinosaur had already been found, especially when so little of the Earth's lands have even been searched for fossils.
A: The word dinosaur means "terrible or terrifying lizard."
A: For information on Pterodactyls, click here.
A: Sellosaurus fossils have been found in Germany. It was a plant-eater. It was about 21 ft (6.5 m) long. As to important fact, gastroliths from its stomach were found, its name means "saddle lizard," it lived during the late Triassic period, about 219 -208 million years ago, and it was named in 1908 by paleontologist von Huene.
A: For information on Protoceratops, click here.
A: For information on Ornithomimus, click here.
A: Click here for information and pictures of Iguanodon.
A: They lived during the Mesozoic Era, from about 230 million to 65 million years ago.
A: A hadrosaur (duck-billed dinosaur) has been found in Minnesota. For more dinosaur finds listed by state, click here.
A: T. rex was named in 1905 by Henry Fairfield Osborn For more information on T. rex fossils, click here.
A: Just about every aspect of an organism's anatomy and behavior is an adaptation to the environment. Some obvious examples are the dinosaurs' diet, claws, tail length, armor (in some cases), spikes (in some dinosaurs), teeth (in most cases), beaks (in some cases), etc.
A: Brontosaurus (which is now called Apatosaurus) fossils have been found in Colorado, Oklahoma, Utah, and Wyoming, in the USA. For more more information on Apatosaurus, click here.
A: Triceratops ate low-lying plants like cycads, palms, and other late Cretaceous plants with its tough, toothed beak and many cheek teeth. For more information on Triceratops, click here.
A: T. rex fossils have been founr in western North America and Mongolia. For more information on T. rex fossils, click here.
A: They were both dromaeosaurids, relatively intelligent dinosaurs. I have no idea which was smarter, however.
A: It ate low-lying plants like cycads, palms, and other late Cretaceous plants with its tough, toothed beak and many cheek teeth. For more information on Styracosaurus, click here.
A: No it did not. For more information on Quetzalcoatlus, click here.
A: T. rex weighed roughly 5 to 7 tons. For more information on T. rex, click here.
A: Most dinosaur groups (like most organisms) died out in background extinctions. These extinctions are not caused by major catastrophes or horrendous climactic changes, but by small changes in climate or habitat, depleted resources, competition, and other changes that require adaptation and flexibility.
At the end of the Triassic period there was a minor mass extinction that killed off many types of organisms, including many dinosaurs. The cause of this extinction is not known.
A: For a page on the evolution of dinosaurs, click here.
A: Pterodactylus (and all the other Pterosaurs) were reptiles and not birds.
A: The oldest-known dinosaurs so far (two prosauropods from Madagascar) date from about 230 million years ago. They are not the earliest possible dinosaurs, because these early finds had already differentiated into saurischian dinosaurs (and were distinct from the ornithischans).
A: Very little is known about this dinosaur since only a part of the skull has been found (so far). Jaxartosaurus is pronounced jax-SAHR-toh-SAWR-us. Jaxartosaurus means "Jaxartes Lizard;" it was named for a river in Kazakhstan near where it was found. Jaxartosaurus was about 30 feet (9 m) long, and was a lambeosaurine hadrosaurid, a duck-billed dinosaur. Fragmentary fossils (just the skull roof and braincase) were found near the Jaxartes River in Kazakhstan. Only an incomplete skeleton was found. This wide-headed plant-eater had flat-topped teeth. It lived during the late Cretaceous period, about 91-83 million years ago. Jaxartosaurus was named by Riabinin in 1939. The type species is J. aralensis.
A: Chelonians are a group of animals that include turtles (like the extinct Archelon, pictured at the left), tortoises, and terrapins.
A: The Triassic was a period in which there were large, continental deserts on Pangaea.
A: Woolly Mammoths were adapted for very cold weather. They has thick, shaggy fur to protect them from the cold. For more information on Mammoths, click here.
A: Click here.
A: 1. No, many theropods had hollow bones (also, Pterosaurs weren't actually dinosaurs). 2. They had hollow bones, and some may have eaten their own kind (many meat-eating animals do). 3. Coelophysis 4. I don't know.
A: Yes, Brachiosaurus had chisel-like teeth. For more information on Brachiosaurus, click here.
A: It could be - there are lots of fossilized fish around.
A: Yes. Egyptian dinosaurs include: Aegyptosaurus, Bahariasaurus, Carcharodontosaurus, Dicraeosaurus, Erectopus, Majungasaurus, and Spinosaurus. Elaphrosaurus was found in Israel. That's all I can find from the Middle East.
A: No, reptiles don't sweat.
A: A woman.
A: Sue.
A: Pteranodons belonged to the:
A: For information and a drawing of Apatosaurus, click here.
A: Most dinosaurs were plant eaters while others ate meat. For information on dinosaurs' diets, click here.
A: For Oviraptor, click here. For Ceratosaurus, click here. For Pterodactylus, click here.
A: Oviraptor (which means "egg thief") was given that name because it was found with eggs near it and it was assumed that it was stealing and eating those eggs. It was later found that those eggs were of the same species, so Oviraptor was found around its own eggs, and the name is probably inappropriate.
A: Here's my chart of geologic time since the time of the dinosaurs. Your calculation should look something like this (the easiest way to do calculations like this is to work with the units, starting with what you know, and playing with the units to get where you want to be):
1 inch/1,000 years times 100,000 years times 1 ft/12 inches = roughly 8,000 feet. You can do the last conversion yourself (there are 5,280 ft in a mile).
A: You might try the paleontology (or geology or biology) department of a local college.
A: Many samples of fossilized dinosaur skin have been found, including that of T. rex. For more information on dinosaur skin, click here.
A: About 1,000 different genera have been found. For the names of all of the known dinosaur genera, click here.
A: Maiasaura went extinct 65 million years ago. For more information on Maiasaura, click here.
A: Elasmosaurus fossils have been found in North America. Its major defences were its teeth and jaws. For more information on Elasmosaurus, click here.
A: Many newly-hatched dinosaur fossils have been found, including hatchlings of Maiasaura, Velociraptor, Mussaurus, and many others.
A: No one has a widely accepted theory as to why there were so many huge animals during the Mesozoic Era.
A: False; they did not live at the same time. T. rex lived millions of years after Stegosaurus.
A: For a page on Jurassic period plants, click here.
A: Kronosaurus was a genus of huge, swimming reptiles that lived during the time of the dinosaurs. Kronosaurus queenslandicus is the type species of the genus Kronosaurus.
A: People have known about sharks since prehistoric times, and probably began naming them then.
A: Different dinosaurs had a different number of fingers, ranging from 2 to 5. For example, T. rex had 2 fingers on each hand, Megalosaurus had three, Syntarsus had four, and Xiaosaurus had five.
A: Longneck is a nickname for Apatosaurus. Its neck was was roughly 40 feet (12.5 m) long. For more information on Apatosaurus, click here.
A: No one knows how many dinosaurs there were. People have found fossils of almost 1,000 different dinosaur genera. For the names of these dinosaurs. click here.
A: Dinosaurs hatched from eggs that were laid by the female dinosaur,
A: Supersaurus' enormous size is the most obvious, along with its long neck, small head, and long tail. For details, click here.
A: Yes, many early people lived in caves.
A: Bipedal.
A: Yes, they had could see, hear, touch, taste, and smell things.
A: The Pterodactyls best defense was flying away. They also had clawed hands and feet for defense. Some Pterodactyls had bristle-like teeth, but others had no teeth. They lived from the Jurassic period through the late Cretaceous period (65 million years ago). For more information on Pterodactyls, click here.
A: Click here.
Q: WHERE CAN I FIND INFORMATION ON
THE TOROSAURUS, AND GET A GOOD PICTURE OF ONE?
A: Click here.
A: Nodosaurus was an armored, plant-eating dinosuar. For more information, click here.
A: The theropods were meat-eating dinosaurs who walked on two legs. T. rex was a theropod.
A: Richard Owen. For more information, see the faq above.
A: For a page on dinosaur evolution, click here.
A: Yes, if indeed birds are the descendants of dinosaurs, they belong to the clade of dinosaurs.
A: The troodontids had the largest brain to body weight ratio, and were probably the smartest.
A: No Diplodocus eggs have been found, so no one knows how (or if) Diplodocus cared for their young.
Q: HOW TALL WAS TYRNASOU
REX
A: Tyrannosaurus rex was up to 40 feet (12.4 m) long, about 15 to 20 feet (4.6 to 6 m) tall. It was roughly 5 to 7 tons in weight. For more information on T. rex, click here.
A: Tyrannosaurs rex means "tyrant lizard king," as a description of this huge predator.
A: Stegosaurus lived until about 140 million years ago. For more information on Stegosaurus, click here.
A: Ornithomimus. For more information on dinosaur diets, click here.
A: Ultrasauros ate plants.
A: The genus and species of T. rex are Tyrannosaurus rex, which is the same as its common name.
A: Only a partial Utahraptor fossil has been found, including claws from the hand and foot, tibia (shin bone), lachrymal (a bone near the eye), premaxilla (part of the jaw), and some tail vertebrae (backbones).
A: There are many species of the genus Ichthyosaurus (hundreds of fossils have been found). Some species include I. intermedius, I. communis, I. janiceps , I. conybeari, and I. breviceps. For information on Ichthyosaurus, click here.
A: For the classification of swordfish, click here. The Banjo shark is actually a ray (the fiddler ray, Trygonorhina fasciata). For ray classification, click here and scroll toward the bottom.
A: In the movie Juassic Park, the Dilophosaurus spat poison, but thre is no fossil evidence that this ever occurred.
A: Apatosaurus was a plant-eater. Allosaurus was a meat-eater. This is known mostly by examining their teeth and jaws. Meat-eaters have knife-like teeth and large, powerful jaws; they also have ways of obtaining meat (like large claws). Plant eaters generally have blunt teeth and relatively small, weak jaws. Sometimes, fossilzied stomach contents or feces are founding, yielding a lot of diet information. For more on dinosaur diets, click here.
A: Probably about the same amount. The sea level has changed many times over the history of the Earth, but this is because the polar ice freezes and melts.
A: The horseshoe crab and the coelacanth.
A: The Jurassic period lasted from 206-144 million years ago. In the Middle Jurassic, the supercontinent Pangaea started to drift
apart. A north-south rift formed in mid-Jurassic, and by the late
Jurassic, the separation of the continents of Laurasia and
Gondwana was almost complete.
Q: On a dinosaur dig in Montana last
ear I found a vertabrae the looks very much likle the caudal vertabrae of a
Hadrasaur, probaly a juvenile. Can you tell me where I can locate some
vertabrae illustrations of Hadrasaur caudal vertabraes?
A: Here's a caudal vertebra from a hadrosaur.
A: Abuot 230 million yeasr old.
A: Brontosaurus means "thunder lizard." The new name for Brontosauurs is Apatosaurus.
A: For a printout on Alamosaurus, click here.
A: No, people evolved many millions of years after the dinosaurs died out.
A: Acanthopholis fossils have been found in England. For more information on Acanthopholis, click here.
A: A habitat is the natural environment in which an organism lives.
A: That isn't known. First of all, it would differ from dinosaur to dinosaur; the huge sauropods (like Brachiosaurus) must have needed a huge area from which to find food, but small dinosaurs, like Compsognathus) may have had a small range. The size of a dinosaur's range would be a function of the amount of food it ate and how much food per area there was. Neither of these quantities is known (yet).
A: Ouranosaurus means "brave lizard." For more information on Ouranosaurus, click here.
A: Triceratops reproduced by laying eggs; that's all that is known about it now (until more fossils are found).
A: Dilophosaurus has two bony crests on its head. Whether or not it had movable things on its head is a matter of conjecture, as is its ability to spit poison (there is no fossils evidence for either of these attributes). For information on Dilophosaurus, click here.
A: In any food chain, there have to be more organisms at the lower levels of the chain because the transfer of food energy is inefficient and much of the energy is wasted. Therefore, there are many more plant-eaters than meat-eaters. For more information on dinosaur diets, click here.
A: Asteroid impact, increased vulcanism, egg thieving by mammals, possible changes in the Earth's orbit, etc. For more information, click here.
A: I've never heard of it. Are you sure of the spelling?
A: It varied from time to time. For a list of many of the major paleontologists of all time, click here.
A: This early plant-eater had three kinds of teeth to get and process tough plant material, biting teeth, tearing teeth, and grinding teeth. Heterodontosaurus ate low-lying Triassic period plants, like cycads, ferns, horsetails, conifers, and other primitive plants.
A: No dinosaurs were well-adapted to live in the water, but many other Mesozoic Era reptiles were, including plesiosaurs, ichthyosaurs, nodosaurs, etc. The largest aquatic reptiles was probably Liopleurodon.
A: The Hadean Eon (4.6 to 3.9 billion years ago), the "Rockless Eon" was the first geoligic time period on Earth: the solidifying of the Earth's continental and oceanic crusts. It ended when the Earth's crust solidified.
A: Click here for a page on Megalodon.
A: There's a dinosaur called Trachodon.
A: For a page on Pterodactyls, click here.
Q: Can someone please tell me what a
Macrauchenia is if it isn't a dinosaur, thank you, Ewan.
A: Macrauchenia was an early hoofed mammal with a long neck; it may have had a long trunk. Macrauchenia was 10 feet ( 3 m) long and had three-toed, rhino-like feet. This quadruped was an herbivore (a plant-eater). Macrauchenia lived during the Pleistocene. Fossils have been found in Argentina, South America. Classification: Class Mammalia (mammals), Order Litopterna (horse-like and camel-like mammals), Family Macraucheniidae.
A: Pterodactyls were a large group of flying reptiles that ranged in size from having a wingspan
of a few inches (primitive Pterodactyls) to over 40 feet (12 m). For a page on Pterodactyls, click here.
A: Click here.
A: It varied from just a few pounds to many thousands of pounds.
A: The earliest-known lemurs (family Lemuridae) date from about 50 million years ago, so they did not live with the dinosaurs. Other pre-primates (primatomorphs like Plesiadapis, a squirrel-like 2 1/2 ft long with teeth like those of rodents) were around during the late Paleocene, about 58 million years ago).
Q: how big is a trex
A: Tyrannosaurus rex was up to 40 feet (12.4 m) long, about 15 to 20 feet (4.6 to 6 m) tall. It was roughly 5 to 7 tons in weight. For more information on T. rex, click here.
A: The blue whale.
A: Woolly mammoths lived in the tundras of Asia, Europe, and North America. For more information on woolly wammoths, click here.
A: T. rex was bigger than Megaraptor. Megaraptor was about 20-26 feet
(6-8 m) long; T. rex was about 40 feet (12.4 m) long.
A: Oviraptor means "egg thief." It probably used its strong beak and claws hands to protect itself from predators. For more information on Oviraptor, click here.
A: There were many dromaeosaurids (also referred to as "raptors"), including Velociraptor, Utahraptor, Deinonychus, and Dromaeosaurus. Many of these raptors (like Utahraptor) probably had no predators.
A: T. rex.
A: Click here for information on T. rex.
A: For a page on Dimetrodon, click here.
A: Click here for information on Iguanodon.
A: None of the plesiosaurs were very well protected from enemies. Flying away would be the best defense. Rhamphorhynchus had a long, pointed beak with many teeth. There are no documented enemies (that is, there have been no fossils of Rhamphorhynchus found inside another animal's body cavity, in another animal's dung, or found in a fight to the death). For possible enemies, go to the page on late Jurassic period fossils, and look for meat-eaters that lived in Europe and Africa. For more information on Rhamphorhynchus, click here.
A: No, not at all. Although Eoraptor was a very early dinosaur, the dinosaurs had already split into the saurischians and ornithischians by then.
A: No one knows, since only the fossilized bones of Eoraptor have been found.
A: Saurischian means "lizard-like."
A: The Mesozoic Era.
A: Most dinosaurs were plant-eaters, and some were meat-eaters. For information on the dinosaurs' diets, click here.
A: Although it's not a guaranteed method, paleontologists use the ratio of an animal's brain size to its body mass. This tells you the relative intelligence among the dinosaurs. For more information on this, click here.
A: Only two Compsognathus fossils have been found, so there is no evidence showing that it hunted in packs. For more information on Compsognathus, click here.
A: The content of asteroids varies; they are made mostly of metals and rock. For more information on asteroids, click here.
A: Teratosaurus was about 20 feet (6 m) long. For more information on Teratosaurus, click here.
A: Oviraptor
A: T. rex was named in 1905 by Henry Fairfield Osborn. For more information, click here.
A: About a thousand are known, but this represents only a tiny fraction of the genera that must have lived. For a list of the known dinosaur genera, click here.
A: Corythosaurus lived during the late Cretaceous period, about 76 to 72 million years ago. For more information on Corythosaurus, click here.
A: Piatnitzkysaurus (meaning "[A.] Piatnitzky lizard") was a theropod dinosaur that was 14 ft (4.3 m) long. This meat-eater had a large head, a short neck, small arms, a bulky body and clawed toes; it was similar to Allosaurus. Fossils have been found in Argentina. Piatnitzkysaurus was a theropod that lived during the late Triassic period, about 169-163 million years ago. The type species is P. floresi.
A: Raptors (dromaeosaurids like Velociraptor, Deinonychus, and Utahraptor) were well-armed. They had a large, deadly, sickle-shaped clae on one toe of each foot. Their other digits also had smaller claws and they had sharp teeth.
A: Ichthyosaurus was a carnivore that ate mostly fish, plus some cephalopods. For more information on Ichthyosaurus, click here.
A: The speediest dinosaurs were probably the bird-like bipedal carnivores (theropods) with long, slim
hind-limbs and light bodies (hollow bones and a streamlined body), like Gallimimus and Ornithomimus. It's impossible to tell which one was actually the fastest. If all we had were bones of modern-day mammals, it would be impossible to tell that the cheetah is the fastest mammal.
A: Pentaceratops was a plant-eater. For more information on Pentaceratops, click here.
A: Click here.
A: Click here.
A: "Paleo" means old or ancient. "Ontology" is the study of existence ("onto-" means existence, "-logy" is the study of something). This "-ist" at the end means a person who is involved in the field.
Q: Do you have any pictures of the
Utharaptor?
A: For more information on Utahraptor, click here.
A: Tyrannosaurus means "tyrant lizard." For more information on T. rex, click here.
A: Hypsilophodon was one of the first dinosaur fossils found. For more information on Hypsilophodon, click here.
A: Kritosaurus (meaning "Noble lizard") is a doubtful genus; this fossils may actually be Gryposaurus, but may be a separate genus. It was a duck-billed dinosaur from the late Cretaceous period, about 76 to 65 million years ago. This hadrosaurid was a plant-eater that was about 30 feet (9 m) long. It had a flat head and a big bump on its snout. It is known from a fragmentary skull found in the San Juan basin of New Mexico, USA. Kritosaurus was named by fossil hunter Barnum Brown in 1910. The type species is K. navajovius.
A: Neither Eoraptor eggs nor nests have been found yet, so no one knows.
A: Tyrannosaurus rex ate Triceratops. Triceratops probably had probably other predators, but T. rex is the only one that is definitely known to have eater Triceratops. Some fossilized T. rex dung was found with crushed Triceratops frill bone in it.
A: Wannanosaurus was named after the Chinese
province where its very incomplete skeleton was
found (and sauros means lizard). For information on Wannanosaurus, click here.
A: For information on Baryonyx, click here.
A: So far, the oldest known dinosaurs are prosauropods from Madagascar that are roughly 230 million years old.
A: I haven't seen calf or chick used elsewhere - have you? I've seen the terms bull and cow used for both plant- and meat-eaters in many sources (including the recent show "Walking with Dinosaurs").
A: Bull and cow are sometimes used for the male female. A newly-hatched dinosaur is generally called a hatchling and as it grows, it is called a juvenile (I've never heard of dinosaur young called calves).
A: The earliest dinosuars were realtively small. Some of the early dinosaurs include prosauropods (small-headed, long-necked plant-eaters) found in Madagascar and theropods (meat-eaeters) found in Argentina.
Q: Why do the Brachiosuaruses have
such long necks and how did they get them
A: That's just like asking why a giraffe has a long neck and how it got it. The long neck developed over millions of years, probably as an adaptation for getting leaves high in the trees. Natural selection would be the mechanism. For more information on Brachiosaurus, click here.
A: It's pronounced va-LOSS-ah-RAP-tor. For more information on Velociraptor, click here.
A: No, but if anyone out there has written any, we'll post them on Zoom Dinosaurs.
A: A paleontologist is a scientist who studies ancient forms of life. Paleo means "ancient." For a page on famous paleontologists, click here.
If you wrote to this page in the last hour or so, your message was inadverdently lost (our disc was full), please write again - we've fixed the problem.
Q: how did the heterodontosaurus go
extinct?
from ?,
?,
?,
?;
May 8, 2000
A: Heterodontosaurus went extinct about 200 million years ago, during the early Jurassic period. This extinction may have bene related to the minor mass extinction toward the end of the early Jurassic period (about 190- 195 million years
ago) in which more than 80% of marine bivalve species and many other shallow-water species died out. The
cause of this extinction is unknown.
A: The Triassic period ended with a mass extinction caused by huge volcanic eruptions about 208-213 million years ago. 35% of all animal families die out,
including most labyrinthodont amphibians, conodonts, and all marine reptiles except ichthyosaurs.
A: Argentina. For more information information on Massetognathus, click here.
A: Chile. For more information information on Metriorhynchus, click here.
A: They're all interesting. For a list of some dinosaurs, click here.
A: Dinosaurs lived from about 230 million years ago until 65 million years ago.
A: Stegosaurus lived during the Jurassic period, about 156-140 million years ago. For more information on Stegosaurus, click here.
A: Dinosaurs first appeared at least 230 million years ago, during the Triassic period.
A: It means "chalk bearing;" the earliest-known cretaceous beds were chalky.
A: Diplodocus means "Double-beamed Lizard". Its backbone had extra bones underneath it, which had bony protrusions running both forwards and backwards (anvil shaped), a "double beam", probably for support and extra mobility of its neck
and tail. For more information on Diplodocus, click here.
A: Most of the animals and plants that ever existed are now extinct.
A: Alamosaurus (meaning "Ojo Alamo [New Mexico] lizard" ) was a long-necked, whip-tailed dinosaur about 69 feet (21 m) long and weighed perhaps 30 tons (20000 kg). It was a quadrupedal, plant-eater from New Mexico, Texas, and Utah, USA during the late Cretaceous period, about 73 million to 65 million years ago. It was a sauropod and a Titanosaurid that may have had some body armor. It was named by Gilmore in 1922. The type species is A. sanjuanensis For a printout on Alamosaurus, click here.
A: The Triassic period.
A: If you're warm-blooded, you can be active day or night, in cold or warm weather. Most cold-blooded animals must warm themselves in the morning sun before they can be active; if you are warm-blooded, you can catch them easily while they are warming up. There are many more advantage (and disadvantage). For a page on this, click here.
A: Dinosaurs evolved from earlier socket-toothed reptiles called archosaurs (during the Triassic period, over 230
million years ago). For a page on dinosaur evolution and early dinosaurs, click here.
A: The dinosaur with the longest name is Micropachycephalosaurus.
A: It would need a way to get food in the water, a way (or ways) to avoid becoming another organism's food, and a way to survive in that environment (like adapt to the temperature, etc.).
A: For a page on dinosaur evolution, click here. Jurassic sauropods probably didn't evolve from Eoraptor (which may have been a theropod, in which case it had already split off from the sauropod dinosaurs). The sauropods may have evolved from prosauropods, or from earlier, as yet unknown dinosaurs. For a cladogram of dinosaurs that shows the evolutionary relationships between the dinosaurs, click here.
A: We only have a diagram of the duckbill platypus' external anatomy.
A: The largest-known dinosaur eggs are about a foot in diameter. For more information on dinosaur eggs, click here.
A: There were many insects during the Mesozoic Era. Unfortunately, insect fossils are very rare, so the scientific knowledge of insect evolution is incomplete. Centipedes and millipedes appeared during the Silurian (over 400 million years ago), springtails appeared during the Devonian (over 350 mya) and the first winged insects appeared over 300 million years ago. Beetles evolved during the Permian period, and huge dragonflies hunted during the Mesozoic. True flies appeared during the Triassic period. The earliest-known butterflies are from the Cretaceous period (about 130 million years ago) as are the earliest-known ants and crickets. Bees also appeared during the Cretaceous (paralleling the development of flowering plants). For more information, click here.
A: For long information sheets, click here. For printouts, click here.
Q: What does a T-rex foot look
like
A: T. rex had bird-like feet with three large toes, all equipped with claws (plus a little dewclaw). T. rex left footprints 1.55 feet (46 cm) long, although its feet were much longer, about 3.3 feet (1 m) long. T. rex, like other dinosaurs walked on its toes. For more information on T. rex, click here.
A: A paleontologist is a scientist who studies ancient forms of life. Paleo means "ancient." For a page on famous paleontologists, click here.
A: Probably. It has been speculated that the ankylosaurs, in particular, were extremely gaseous.
A: This is the oddest dinosaur question I've ever gotten. The Susan B. Anthony Dollar Coin was first minted in 1979.
Q: How big is the tyranasaurus
rex?
A: Tyrannosaurus rex was up to 40 feet (12.4 m) long, about 15 to 20 feet (4.6 to 6 m) tall. It was roughly 5 to 7 tons in weight. For more information on T. rex, click here.
A: The badlands of South Dakota, USA have vast expanses of exposed ancient rocks which make it relatively easy to find some of the fossils that are buried there.
A: (pronounced mutt-ah-BUHR-ah-SAWR-us) Muttaburrasaurus (meaning "Muttaburra (Australia) lizard" ) was an ornithopod, a plant-eating dinosaur about 24 feet (7 m) long, dating from the middle Cretaceous period, about 113-97.5 million years ago. It had a large bulge on its long snout between its eyes and its mouth, a flattened thumb spike, hoof-like claws, and teeth that worked like shears. The bony bump on its snout may have been associated with its sense of smell or its ability to make sounds. Muttaburrasaurus is either an Iguanodontid or a Camptosaurid dinosaur. It was described and named by Ralph E. Molinar and Alan Bartholomai in 1981 from a fossil found in Queensland, Australia. The type species is M. langdoni.
A: Dinosaurs lived in many different environments on land during the Mesozoic Era, but some envionments made fossilization more likely. Fossils are more easily found in places like badlands because erosion has exposed old layers of rock and fossils, but there weren't necessarily more dinosaurs there to begin with. Dinosaur fossils aren't found in some areas where dinosaurs lived because the Mesozoic Era rock layers are well-buried, or fossils didn't form in that location because conditions were adverse to the fossilization process. Dinosaurs fossils aren't found in some areas because dinosaurs either didn't fossilize well there, or dinosaurs didn't live there (often because that location was under water during the Mesozoic Era, when sea levels were high).
A: (meaning "[A.] Piatnitzky lizard") was a theropod dinosaur that was 14 ft (4.3 m) long. This meat-eater had a large head, a short neck, small arms, a bulky body and clawed toes; it was similar to Allosaurus. Fossils have been found in Argentina. Piatnitzkysaurus was a that lived during the late Triassic period, about 169-163 million years ago. The type species is P. floresi.
A: For information on Kronosaurus, click here. For information on other Plesiosaurs, click here.
A: John Flynn et al. published early findings in Nature (Sept. 2, 1999 ) and Science (Oct. 22, 1999). They found not only the earliest-known dinosaurs, but the jaw bone of a new, early, shrew-sized species of mammal from 165 mya (which they named Ambondro mahabo), and other early life. I don't think that the name of the dinosaur has been published yet - I'm not sure they're entirely out of their matrix yet. I'll add it to the site as soon as its published.
A: There's geochemical evidence (like the way ancient soils formed, and did they form year-round, indicating a warm climate or was there a winter break, indicating a cold climate), biological evidence (like seeing organisms that could only live in certain climates), and physical evidence (like seeing the boulders and depressions caused by ancient glaciers, even though the glaciers have melted long ago).
A: For information on Brachiosaurus, click here.
A: No.
A: The earliest-known dinosaurs are two 230 million-year-old dinosaurs recently found in Madagascar and Eoraptor (230 million years old), found in Argentina.
A: The earliest-known fossils are of single-celled organisms (like colonial algae) that date from the Archeozoic Eon, about 3.9 to 2.5 billion years ago.
A: For a list of the known dinosuar genera, click here.
A: For early Cretaceous dinosaurs, click here. For middle Cretaceous dinosaurs, click here. For late Cretaceous dinosaurs, click here.
A: No one knows what color any of the dinosaurs were.
A: For a diagram of T. rex, click here. For T. rex's skeleton, click here.
A: Apatosaurus.
A: The largest-known dinosaur eggs are about a foot in diameter. For more information on dinosaur eggs, click here.
A: For information on Megalodon, an ancient shark, click here.
A: Anatosaurus (named by Lull and Wright in 1942) is an obsolete name for Edmontosaurus. For information on Edmontosaurus, click here.
A:
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A: T. rex was a carnivore (a meat-eater). For more information on T. rex's diet, click here.
A: The new name for Brontosauurs is Apatosaurus. For information on Apatosaurus, click here.
A: For information on dinosaur reproduction, click here.
A: For information on Ceratosaurus, click here.
A: No one knows. For information on Velociraptor, click here.
A: Trachodon (meaning "rough tooth") was named in 1856 by Joseph Leidy. For more information on Trachodon, click here.
A: Woolly Mammoths were herbivores (plant-eaters). For more information on these extinct mammals, click here.
A: For a page on early dinosaur discoveries, click here.
A: There were many different Pterodactyls, including Pterodactylus, which had a 2.5 foot (0.75 m) wide wingspan. For more information on Pterodactylus, click here.
A: The earliest-known dinosaurs are two 230 million-year-old dinosaurs recently found in Madagascar and Eoraptor (230 million years old), found in Argentina.
A: No one knows for sure, but the enormous sauropods (like Apatosaurus, Brachiosaurus, Supersaurus, etc.) may have lived the longest, about 100 years.
A: No one knows, but it probably differed for the different dinosaurs. The smaller ones probably slept lying down. The giants (like Apatosaurus) probably remained on their feet.
A: The Triassic period was the first third of the Mesozoic Era.
A: The duck-billed dinosaurs (Hadrosaurs) had the most teeth; they had up to about 960 cheek teeth.
A: The Plesiosaurs were large reptiles (but not dinosaurs) that lived in the seas during the time of the dinosaurs.
A: Meat-eaters nd plant-eaters have very different teeth. There are other differences, including gut size, eye placement, etc. For more information on dinosaur diets, click here.
Yes, alligators are related to dinosaurs, they are both reptiles and archosaurs.
A: Some walked on four legs, some walked on two, and some coud do either. For more on dinosaur locomotion, click here.
A: Paleontologists study fossils. For a page on famous paleontologists, click here.
A: About 1649.
A: For information on Hyracotherium (another name for Eohippus), click here. For Morganucodon, click here.
A: Utahraptor a huge, sickle-shaped claw on each foot that was probably used to kill its prey. It also had smaller claws on its fingers. For more information on Utahraptor, click here.
A: For information on Allosaurus, click here.
A: Gallimimus had a beak whose bottom front was shaped like a shovel. For information on Gallimimus, click here.
A: For information on the Jurassic period, click here.
A: For a printout of Plesiosaurs, click here.
Q: How many toes does Tyrannosaurus
Rex have on his back foot? We found two different sources, one said three
toes and the other said four.
A: T. rex had three large toes on its hind feet. There was also a tiny dew claw (a vestigial toe) higher up on the leg. For more information on T. rex's skeleton, click here.
A: No one knows.
A: It has been estimated that 80-90% of marine species went extinct, about 50% of the marine genera and about 15% of the marine families. For land animals, about 56% of the genera, about 25% of the families went extinct, and about 85% of the species died out. Larger animals (over about 55 pounds=25 kg) were all wiped out.
A: For information on Utahraptor, click here.
A: Anatotitan.
A: For information on Barosaurus, click here.
A: Most dinosaurs were herbivores (plant-eaters). For more information on the dinosaurs' diets, click here.
A: Click here.
A: Mosasaurus was a Mosasaur that was up to 33 ft (10 m) long. Mosasaurus had four paddle-like limbs on a long, streamlined body and a long, powerful tail. The large head had huge jaws (up to 4.7 ft =1.45 m long) with many teeth. The jaws could open about 3 feet (1 m). The lower jaw is loosely hinged to the skull with a moveable joint on each side (behind the teeth). This loose joint let it swallow huge prey, like some snakes. They hunted fish, turtles, mollusks, and shellfish. It Mosasaurus lived in the North Atlantic Ocean. Mosasaurus maximus found in Onion Creek, Texas, USA. It was 30 foot (9 m) long and its tail was about 12 ft (3.7 m) long. This huge reptile was discovered in 1934 by University of Texas geology students Clyde Ikins. The first Mosasaur, Mosasaurus hoffmani, was found in the Netherlands in 1780. It was named in 1822 by W.D. Conybeare. Mosasaurs are related to modern-day monitor lizards.
For general information on Mosasaurs, click here.
A: It is not known with any certainty - there's evidence both ways. Some dinosaurs were probably warm-blooded and others were probably cold-blooded, For information on this topic, click here.
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