1.   And birds are somehow descended from dinosaurs.

2.   Most of them think birds are descended from small carnivorous dinosaurs, but even that is in dispute.

3.   Most paleontologists think birds are descended from small carnivorous dinosaurs, but even that is in dispute.

4.   Which makes sense, because birds are descended from the therapod dinosaurs, the meat-eating group that included tyrannosaurus and allosaurus.