Tardigrade. Bob Goldstein's Lab, Distributed under CC BY-NC-SA 2.0 license.

From: Why Life Does Not Really Exist by Ferris Jabr at Brainwaves

Source: Goldstein Lab on Flickr

Tardigrades are among the most hardy creatures on earth. These tiny, half-millimeter long organisms can survive freezing, boiling, dehydration, and starvation. This scanning electron micrograph, taken in Bob Goldstein’s lab at the University of North Carolina at Chapel Hill, shows the characteristic claws and stout build. The Goldstein
lab’s flickr page is worth a visit: http://www.flickr.com/photos/waterbears/

-Alex Wild