BBC Earth: Tardigrades Return from the Dead

Tardigrades, or waterbears, are tiny, ancient creatures that seem to be nearly indestructible. Put them in any extreme environment and they can survive. They have survived microgravity and cosmic radiation after being blasted into space. They have come back to life after decades of desiccation. A vacuum or extreme heat, cold, or pressure cannot kill them. These animals provide a fascinating subject for a study of animal adaptations.

Courtesy of Knovation