Ancient Worms Revived From Permafrost After 46,000 Years – The New York Times

At a time when the mighty woolly mammoth roamed the Earth, some 46,000 years ago, a minuscule pair of roundworms became encased in the Siberian permafrost.

Millennia later, the worms, thawed out of the ice, would wriggle again, and demonstrate to scientists that life could be paused almost indefinitely.

via www.nytimes.com

Sounds like the premise for a horror movie.