Argentavis magnificens was so massive it should’ve stayed grounded. Yet, this giant prehistoric bird still ruled the skies of ...

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Birds are often admired for their lightness—feathers, fragile bones, effortless flight. But in rare cases, nature scales up. Some species grow so large that their ability to take off and stay airborne ...

Sometimes finding a skeleton in a closet can be a good thing — if you’re a paleontologist. Meet Pelagornis sandersi, a giant bird with a wingspan 21 feet across — so wide that it could have been the ...