This funny looking little guy can survive boiling hot water, outer space, and decades without food or water. It's called a "tardigrade" or "water bear". It's just one of many aquatic invertebrates ...

I approached her very, very slowly,' he says, 'and then drifted. It was a cat-and-mouse game.' When the bear slipped into the water, he just waited. 'There was just a flat, world of water and ice and ...