Researchers calculated the flight ability of more than 80 ancient cicada species to analyze their evolution over time.

A newly identified wrist bone in two non-avian dinosaurs has challenged long-held assumptions about the evolution of flight.

Scientists have uncovered a surprising piece of the puzzle in the evolution of flight: a tiny wrist bone in certain dinosaurs ...

Bird Evolution: Few subjects in evolutionary theory have posed such intriguing puzzles for so long as the origin of birds. Evidence of avian beginnings has been elusive in the fossil record ...

What we do know is that bird evolution was complicated. Many characteristics of birds seem to have evolved multiple times in dinosaurs, across numerous families. One of the main traits of birds today, ...

The updated bird family tree delineating 93 million years of evolutionary relationships between 363 bird species. CREDIT: Jon Fjeldså (drawings) and Josefin Stiller.

The fossil skeleton of a newly discovered dinosaur species was found in a pose suggesting it slept like modern birds. This sleeping behavior may have been more common than expected among non-avian ...

Scientists uncovered a 149-million-year-old bird fossil in southeastern China with unexpectedly modern traits they believe could rewrite the evolutionary history of birds. The recently discovered ...

Unlike birds, the evolution of bats’ wings and legs is tightly coupled, which may have prevented them from filling as many ecological niches as birds.

An analysis of two theropod dinosaur fossils has shown that they had a type of carpal bone (pisiform) in their wrists—a bone ...