Slow-motion footage of baby birds helps scientists uncover how their ancestors took to the skies. Birds today make flight look effortless, but its evolution was complex. Scientists are still trying to ...

Birds flying inspire awe — but how much do you know about flight? Learn which bird flies highest, which flying bird is heaviest, and more.

Researchers examined dozens of bird species in museum collections looking for differences in the feathers and bodies between birds that can fly and birds that can't. They found that when birds evolve ...

Birds today make flight look effortless, but its evolution was complex. Scientists are still trying to discover exactly how birds took to the skies, and today, a new perspective has emerged by ...

More than 99% of birds can fly. But that still leaves many species that evolved to be flightless, including penguins, ostriches, and kiwi birds. In a study in the journal Evolution, researchers ...