Of course, it isn't just their looks that make them seem well-suited to the ET lifestyle; as NASA explains, the millimeter-long tardigrades are "known to be able to go for decades without food or water, to survive temperatures from near absolute zero to well above the boiling point of water, to survive pressures from near zero to well above that on ocean floors, and to survive direct exposure to dangerous radiations." Oh, and "they can repair their own DNA and reduce their body water content to a few percent."
Source: ufo-chronicles.blogspot.com
