>> |
Anonymous
>>307356 >>307357 You're both half right. At first there was a severe dearth of oxygen, leading to the development of the dinosaurian air sac lung. Then oxygen levels rose dramatically, leading to giant dinosaurs, thanks to those super-effective lungs. So for supergiant sauropods and things like Allosaurus and Tyrannosaurus our atmosphere might be too oxygen poor, but the smaller dinosaurs would survive just fine, like birds do.
Backwards-engineering birds to dinosaurs would be interesting, if they could ever make it work. Dromaeosaurs like Velociraptor were essentially secondarily flightless protobirds, so many traits they and first birds had in common might still be conserved somewhere in the modern bird genome, or at least relatively easy to bring back.
|