http://www.newsweek.com/tardigrade-darpa-biostasis-freeze-soldiers-time-1381683

Tardigrades are the only animal known to have survived in the vacuum of open space. They can survive temperatures of up to 304 degrees Fahrenheit, and withstand being frozen— for as much as 30 years, in one documented case.

They can also survive without water for up to a decade by shriveling up and placing themselves in something resembling a state of suspended animation—and it is this trait that has scientists at Harvard Medical School, the University of Washington and MIT interested.