"Many species of tardigrades live in water, but on land, you find them almost everywhere there's moss or lichen." In 2007, scientists discovered that these microscopic critters can survive an extended stay in the cold, irradiated vacuum of outer space. read more
Video: Tardigrades, or water bears, are microscopic animals that live in soil and other environments Tiny invertebrates called ‘water bears’ can survive in the vacuum of space, a European Space Agency experiment has shown. read more