A pair of evolutionary biomechanics specialists at the University of London's, Royal Veterinary College, has found that when hippos run at full speed, all four of their feet are regularly in the air.

Analysis shows hippos get all four feet off the ground simultaneously for up to 15% of the time when running at full speed For a brief moment lasting 0.3 seconds per stride, some hippos 'fly' by ...

Of course, hippos cannot fly. How can these animals, which normally weigh thousands of pounds, even fly? It turns out they basically can; it only took some high-speed videos and some experts to prove ...