Avisaurus darwini

An undated illustration of the newly described Cretaceous Period bird species Avisaurus darwini, which has traits on a foot bone that indicate that it was one of the earliest-known birds of prey, shown here carrying a small mammal. Illustration by Ville Sinkkonen/Handout via REUTERS
Science

Oldest-known birds of prey lived alongside T rex in North America

Researchers have discovered in Montana the remains of two newly identified Cretaceous Period avian species dating to about 67 million years ago that display anatomical traits resembling today'...