2M views · 45K reactions | The name Hippopotamus means “river horse” in Greek—but did you know hippos can’t actually swim? Discover five surprising facts about hippos, and then learn about some of nature's other misfit animals: https://on.natgeo.com/3Wu4AJL | National Geographic Science | Facebook

139K views · 6.6K reactions | The wings of blue morpho butterflies are iridescent blue — but contain absolutely no blue pigment! The color is achieved by tiny scales on the wings that have ridges, ribs and other structures that play with the physics of light at the nanoscale to reflect only bright blues. | Center for Biological Diversity | Facebook