There's a species of jellyfish, the turritopsis nutricula, which can revert to its polyp (immature) state from a fully mature state; hence, it can indefinitely live. Barring being eaten or something, of course. They're 2mm long, too. 'pretty much the only creature that can, save for Hydra, Water Bears and colonies of bacteria (effectively).
Thursday, June 17, 2010
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