Board Thread:Wiki Discussion/@comment-26938547-20151206180148/@comment-26818010-20151231232448

Did T. Rex Have Feathers?
A feathered T. rex? Probably so--at least when the animals were young. Paleontologists think feathers may have first evolved to keep dinosaurs warm. But while a young T. rex probably had a thin coat of downy feathers, an adult T. rex would not have needed feathers to stay warm. Large warm-blooded animals--like T. rex or modern elephants--generate a great deal of body heat so they usually don't need hair or feathers to keep warm. This is probably why elephants, which are mammals, don't have much hair.