As dinosaurs evolved into birds, their straight wrists gradually transformed into flexible wings. The process, over the course of millions of years, altered their bone structure – but exactly how this ...

An analysis of two theropod dinosaur fossils has shown that they had a type of carpal bone (pisiform) in their wrists—a bone considered important to flight in birds. Subscribe to our newsletter for ...

New Haven, Conn. — The evolutionary path from dinosaurs to birds included the development of a tiny wrist bone that ultimately proved crucial for stabilizing wings in flight. A new study suggests that ...

A tiny, overlooked wrist bone called the pisiform may have played a pivotal role in bird flight and it turns out it evolved far earlier than scientists thought. Fossils from bird-like dinosaurs in ...

IN a recent letter in Nature, Prof. Harris 1 gave radiological evidence for the appearance of a separate epiphysial centre in the pisiform bone of sub-human primates. In view of the considerable ...