http://www.newsweek.com/beluga-whale-knees-viral-whales-dont-have-legs-965267

You learn something new every day. For instance, you are about to learn today that beluga whales don't have legs. And, sure, that feels obvious, but apparently that's a question some folks had. So here we are: Beluga whales + lower half of the body = not legs.

It all started, as things often do on the internet, with a good ol' tweet.