 actually get all four of their limbs off the ground at the same time when they're on land. The lead author of the study says up until now, they didn't know a lot about how the animals actually move around when they're on the land. Scientists looked at videos to get their findings, and the videos showed when hippos felt threatened or motivated, like by another animal, they would move fast and then go airborne. Sports at 25 and 55. Powered by Maximus. Moving people and technology forward.