A: For early Jurassic dinosaurs, click here. For middle Jurassic dinosaurs, click here. For late Jurassic dinosaurs, click here.

A: If you find fossils of marine organisms in an area, you known that there was once water in that location.

A: For information on the duck-billed dinosaurs (also called Hadrosaurs), click here.

A: No one knows their sleeping positions (but it probably varied from genus to genus). The smaller ones (like Compsognathus) probably lay down.

A: Diplodocus was about 90 feet (27 m) long with a 26 foot (8 m) long neck and a 45 foot (14 m) long tail.

A: No. Fossilized T. rex skin has been found and it shows no evidence of feathers. Some paleontologists recently began to think that perhaps young T. rex may have had feathered skin. For information on T. rex, click here.

A: Thanks to some fossilized T. rex feces, it is known that T. rex probably included Triceratops in its diet, but whether or not it was T. rex's mainstay is unknown.

A: Like most other hige animals, its size is its main defense (not only are they hard to kill, they are even hard to take a single bite from.

A: During the Cretaceous period, it waarmer than it is now and drier. The sea level was higher, since there was little or no polar ice during the Cretaceous. Volacanism was high during the Cretaceous. For more information on the Cretaceous period click here.

A: Most likely.

A: Click here for a page on early mammals.

A: All that is known is that Stegosaurus laid eggs.

A: Most dinosaurs were plant eaters; fewer were meat-eaters.

Scientists are planning on cloning woolly mammoths from well-preserved mammothes that were recently found in Siberia.

A: For a page on the Silurian period, click here.

A: The Isle of Wight (an island off the southern coast of England) has an incredible number of fossils, including many dinosaurs. Many Iguanodon fossils and trackways (about 50 footprints) have been found in the Wealden shale beds on the Isle of Wight. Iguanodon atherfieldensis (6 m long) was found by Reginald Hooley (an amateur fossil hunter) early in the 1900's.

A: For a section on the Jurassic period, click here.

A: It isn't known with any certainty, but it probably ate low-lying plants like cycads and ferns. For more information on Triceratops, click here.

A: Fossilized eggs gan yield information on time, reproduction, anatomy, development, and some behaviors. Radio-isotope dating can tell you how old the egg is. Its size can give you a rough estimate of the size of the adult. The existence of the egg lets you know that this species reproduced by laying eggs Most fossilized eggs do not contain a fossilzed fetus, but those rare ones that do can yield a lot on information about the anatomy and development of the animal. If there is a fossilized nest and fossilized adults of the same species in the area, you can surmise that there was probably parental care of the eggs. Large numbers of eggs in one area can indicate herding behavior of the species.

A: Brachiosaurus fossils have been found in western North America and Tanzania, Africa.

A: Hybodos was a genus of extinct sharks from the Carboniferous period, that lived from the Triassic period until it went extinct during the huge K-T mass extinction 65 million years ago, when the dinosaurs died. This hybodont had fin spines, an anal fin, a blunt snout, and a long body. It had sharp teeth at the front of the jaws (for catching fish) and blunt teeth towards the back (for crushing shellfish). Hybodos was about 7.5 feet (2.5 m) long. Hybodos tooth fossils are found worldwide.

A: One is the dragonfly.

A: No, the bigger ones probably had longer life spans. For a page on dinosaur life spans, click here.

A: Plesiosaurs were an order of carnivorous marine reptiles (not dinosaurs) that had sharp teeth. The sharp teeth were used for getting food and for protection. Some had a small head (the long-necked Plesiosauroids) and others had a large head (the short-necked Pliosauroids).

A: There are lots of likely methods. Some ways include camouflaged coat coloration (effectively hiding the animal), retreating to burrows, and moving quickly. If most dinosaurs lived during the day (were diurnal) then a mammal could be most active at night (be nocturnal). You can probably think of other ways that a tiny animal can hide from a larger animal.

A: Dinosaurs went extinct about 65 million years ago.

A: T. rex lived in what is now North America and Asia (Mongolia).

A: Three horn.

A: No one knows. For a page on this debate, click here.

A: Anchisaurus was a primitive plant-eating dinosaur anout 6.5 to 8 ft long. For more information on Anchisaurus.shtml, click here.

A: That an asteroid hit the Earth, triggering drastic climate changes. For more information on the K-T extinction, click here.

A: Plesiosaurus was first found by Mary Anning in 1821 and was named by H.T. De La Beche and William D. Conybeare later that year

A: We do, click here for the dictionary entry or click here for a printable page on Ichthyosaurus.

A: The sauropods ranged in size from the early Anchisaurids that were 7-10 feet (2-3 m) long to the later giants (like diplodocids, titanosaurids, and brachiosaurids) that were over 100 feet long.

A: Scutellosaurus was about 4 feet (1.2 m) long and weighed about 22 pounds (10 kg).

A: The meat-eating dinosaurs are called theropods. Some theropods included T. rex, Allosaurus, Giganotosaurus, Gallimimus, Velociraptor, Utahraptor, Deinonychus, and Eoraptor.

A: There were many more herbivores (plant-eaters). For a page on dinosaur diets, click here.

A: There were many dinoasaurs that may have had a "sail" on their back, including Spinosaurus, Ouranosaurus, Acrocanthosaurus, and others. Dimetrodon was a sail-backed pelycosaur (not a dinosaur) that lived before the dinosaurs evolved.

A: A complex community of plants and animals in a region and a climate is called a biome. Some examples of biomes are tropical rain forest, termperate deciduous forest, tundra, etc. For information on some major biomes, click here.

A: Corythosaurus lived during the Cretaceous period, roughly 80 to 65 million years (this was towards the end of the Mesozoic Era). ago

A: They don't - see the faq's above.

A: Click here for a page on Komodo dragons.

A: No, the tallest animals are not necessarily the heaviest. For a modern-day example, compare the giraffe and the elephant. The giraffe is much taller, but the elephant weighs much more. Looking at dinosaurs, the giraffe-like Brachiosaurus, Sauroposeidon and Ultrasauros, were the tallest dinosaurs, but other sauropods (like Argentinosaurus) weighed more.

A: T. rex preyed upon Triceratops, and Triceratops probably fought back energetically (to put it mildly).

A: Diplodocus mean "double beamed." For information on Diplodocus, click here.

A: For information on Compsognathus, click here.

A: None, see the faq's above.

A: No one knows if it was endothermic or ectothermic. They laid eggs. For information on T. rex's locomotion, click here.

A: About 65 million years ago.

A: No, Louisiana was underwater during the Mesozoic (it was hotter then and there was no polar ice, so the sea level was higher).

A: The Triassic was a period in geologic time. The Triassic period lasted from 248 - 206 million years ago. For more information on the Triassic period, click here.

A: THere were no underwater dinosaurs. See the faq's above.

A: None - T. rex was an evolutionary dead end. Some other theropod dinosaurs (probably the maniraptors) evolved into the birds.

A: T. rex fossils have been found in North America and Mongolia.

A: For information on Fabrosaurus, click here.

A: No, they didn't have three middle ear ossicles (the malleus, incus and stapes).

A: Click here.

A: Some early meat-eaters include Arctosaurus, Ceratosaurus, Coelophysis, Dilophosaurus, Dolichosuchus, Eoraptor, Frenguellisaurus, Halticosaurus, Herrerasaurus, Ischisaurus, Likhoelesaurus, Liliensternus, Procompsognathus, Rioarribasaurus, Saltopus, Staurikosaurus, Velocipes and Zatomus. For other Triassic dinosaurs, click here.

A: For a page on Camptosaurus, click here.

A: THe closest I know of is a page on dinosaur families that lists their size range in the far right column) - click here.

A: T. rex fossils have been found in North America and in Mongolia.

A: T. rex weighed about 5 to 7 tons. For more information on T. rex, click here.

A: Dinosaurs were reptiles.

A: A nice project is to research one period during which the dinosaurs lived and make a diorama picturing it. He could look up which dinosaurs, other animals, and plants lived during that time. He could then draw them (or model them in clay) and put them in a box (which is painted to look like an a prehistoric scene), and label everything.

For Jurassic period information, click here (for a list of Jurassic dinosaurs, click here, for Jurassic plants, click here). For Cretaceous period information, click here (for a list of Cretaceous dinosaurs, click here, for Cretaceous plants, click here). For a simple dinosaur diorama with instructions with printouts, click here.

A: For a page with the meaning of many dinosaur names, click here. For a page with the Greek and Latin roots used in many of their names, click here.

A: The first Triceratops skull was found in 1888 by John Bell Hatcher, in Niobrara County, Wyoming, USA. For more information on Triceratops, click here.

A: Click here.

A: For a page on Pterodactyls, click here.

A: Megalodon looked like a larger, streamlined version of a great white shark.

A: I've seen as estimate of 43 kg.

A: Six ways that organisms turn into fossils include:

• unaltered preservation (like insects trapped in amber)
• permineralization=petrification (in which rock-like minerals seep in and replace the original tissues - most bone fossils are permineralized)
• replacement (An organism's hard parts dissolve and are replaced by other minerals, like calcite, silica, pyrite, or iron)
• carbonization=coalification (in which only the carbon remains in the specimen - other elements, like hydrogen, oxygen, and nitrogen are removed)
• recrystalization (hard parts either revert to more stable minerals or small crystals turn into larger crystals)
• authigenic preservation (molds and casts of organisms that are destroyed or dissolved).

A: Not enough to clone a dinosaur, but some Triceratops gene fragments may have been extracted.

A: Fossil fuels, like oil, are made from long-dead plants and animals (mostly plants).

A: For a page on how dinosaurs are named, click here.

A: Click here.

A: The name Maiasaura means "good mother lizard." For more information on this dinosaur, click here.

A: Click here.

A: Futabasaurus was a tyrannosaurid dinosaur (related to T. rex) thatwas found in Japan. For more information, click here.

A: Dinosaurs lived from about 230 million years ago until 65 million years ago.

A: Velociraptor's middle toe claws were 3.5 inch (9 cm) long.

A: Pteranodon was named by paleontologist Othneil C. Marsh in 1871 (I don't know who actually found the fossil).

A: Brontosaurus (a huge, plant-eating dinosaur) is now called Apatosaurus.

A: Click here.