LifeAlligators' bird breath may explain dinosaurs' triumph The airflow through alligators' lungs is strikingly bird-like, suggesting that super-efficient one-way airflow evolved in an ancestor of dinosaurs 51¶¯Âþ
LifeEarly birds may have dropped teeth to get airborne Fad dieting wasn't an option in the Cretaceous, so the earliest birds went to more extreme measures to address weight issues 51¶¯Âþ