Giant Bird Fossils with 21ft Wingspans Found in Antarctica

Imagine an albatross with a hacksaw for a mouth. Set that strange creature about 50 million years in the past and you&rsquove got the image of a pelagornithid, a group of ancient avians that included some of the largest flying birds of all time. And now paleontologists have uncovered in that group what may be the largest known flying birds ever, with wingspans of roughly 21 feet.