The wrists of the dinosaurs 3, 7 Heterodontosaurus, Coelophysis, Allosaurus, Sinovenator and Sapeornis, and that of a modern bird (Gallus gallus) highlight the complexity of wrist evolution.

Gallows, gallus, headframes — by any name, they’re pretty special monuments to our history. And only in Butte do they light up the night sky. — Roberta Forsell Stauffer, The Montana Standard ...