Discover the U.S. birds with the largest wingspans. Learn where these impressive birds can be found and other fascinating ...

Birds, by design, tend to be small, light and streamlined. Yet there are some that push the boundaries of size. Here is the avian world’s best example of an ultra-heavyweight flyer.

The giant moa has been extinct for 900 years, but Maori researchers working Colossal Biosciences and filmmaker Peter Jackson are partnering to bring the species back.