Dinosaurs to birds (Introduction)
Getting smalller did the trick. Looks purpose driven to me:-http://www.the-scientist.com/?articles.view/articleNo/40675/title/How-Tinier-Theropods-Took-Flight/
Getting smalller did the trick. Looks purpose driven to me:-http://www.the-scientist.com/?articles.view/articleNo/40675/title/How-Tinier-Theropods-Took-Flight/