Dinosaurs Into Birds

If you want to better understand how Dinosaurs Shrunk Into Birds check out this Video

“Arms into feathered wings; bones hollowing out; morphology minimizing: The lineage of modern day birds includes the Tyrannosaurus and the Velociraptor, dating back over 50 million years. Common traits from Neotheropoda to Archaeopteryx”

http://www.livescience.com/47125-dinosaurs-shrinkage-into-birds-explained-video.htmlDinosaurs’ 'Shrinkage' Into Birds Explained