2 points | by bigwheels 11 hours ago ago
1 comments
It's suggested that mammals remained so small after the asteroid, and birds got so big so fast, because birds had some vestigial dinosaur 'big genes' and mammals had none.
It's suggested that mammals remained so small after the asteroid, and birds got so big so fast, because birds had some vestigial dinosaur 'big genes' and mammals had none.