If doomsday strikes, this eight-legged 'freak' animal shall inherit the Earth

If a monster space rock crashes into our planet or radiation from an exploding star boils our oceans, humans and most other life forms will disappear. But one creature is sure to survive, according to a study published Friday. And it will keep going for as long as the Sun doesnt die -- at least another 10 billion years. Earths designated heir is the tardigrade, a microscopic, grub-like, eight-legged animal that can live in water or on land, in extreme pressure high or low.