It is often argued that hippos cannot swim and that they move through the water by treading the bottom. If this is the case then it opens up this interesting debate into how hippos reached many islands. Hippo colonization may also, therefore, provide evidence into the connections of several islands, such as Cyprus and Madagascar, to the mainland. The article provides an interesting multidisciplinary approach to studying past topography and dispersal.
There is no published account where hippopotamuses are demonstrably shown swimming or floating at the surface of any body of water. But if they can't swim, how did they reach and colonize islands?