Discover the top 10 largest flying birds, ranked by wingspan and weight. Learn about their habitats, flight styles, and ...

An intact, fossilized specimen of the world’s largest egg—of any known species ever on Earth—entered the National Geographic ...

“There are good feeding grounds offshore for marine birds, and there ... the story of the megalodon, the largest shark ever to exist. Then, learn about 10 prehistoric creatures that were as ...

This enormous bird of prey has long been extinct for some 500 years and was undoubtedly the largest eagle to have ever lived. For a time, Haast's eagle, or Harpagornis moorei, ruled the skies ...