You might also like: | Dinosaur Evolution - ZoomDinosaurs.com | Dinosaur Extremes | Dinosaur Myths | Dinosaur Museums- ZoomDinosaurs.com | How to Write a Great Dinosaur Report | Today's featured page: Time: Cloze Activity |
ZoomDinosaurs.com ALL ABOUT DINOSAURS! |
What is a Dinosaur? | Dino Info Pages | Dinosaur Coloring Print-outs | Name That Dino | Biggest, Smallest, Oldest,... | Evolution of Dinosaurs | Dinos and Birds | Dino Myths |
In 1868, Thomas Henry Huxley interpreted the Archaeopteryx fossil to be a transitional bird having many reptilian features. Using the fossils of Archaeopteryx and Compsognathus, a bird-sized and bird-like dinosaur, Huxley argued that birds and reptiles were descended from common ancestors. Decades later, Huxley's ideas fell out of favor, only to be reconsidered over a century later (after much research and ado) in the 1970's. In 1986, J. A. Gauthier looked at over 100 characteristics of birds and dinosaurs and showed that birds belonged to the clade of coelurosaurian dinosaurs. [Gauthier, J.A., 1986. Saurischian monophyly and the origin of birds, in The Origin of Birds and the Evolution of Flight, California Academ of Sciences Memoir No. 8] |
Bird fossils are rare because bird bones are hollow and fragile, but Jurassic, Cretaceous, Eocene and Miocene-Pliocene bird fossils have been found. |
Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below
Overview of Site What's New Enchanted Learning Home Monthly Activity Calendar Books to Print Site Index K-3 Crafts K-3 Themes Little Explorers Picture dictionary PreK/K Activities Rebus Rhymes Stories Writing Cloze Activities Essay Topics Newspaper Writing Activities Parts of Speech Fiction The Test of Time
|
Biology Animal Printouts Biology Label Printouts Biomes Birds Butterflies Dinosaurs Food Chain Human Anatomy Mammals Plants Rainforests Sharks Whales Physical Sciences: K-12 Astronomy The Earth Geology Hurricanes Landforms Oceans Tsunami Volcano |
Languages Dutch French German Italian Japanese (Romaji) Portuguese Spanish Swedish Geography/History Explorers Flags Geography Inventors US History Other Topics Art and Artists Calendars College Finder Crafts Graphic Organizers Label Me! Printouts Math Music Word Wheels |
Click to read our Privacy Policy
Search the Enchanted Learning website for: |