Wikipedia Wednesday is upon us once again. Hooray! This one took a bit of hunting down, because I remembered reading about this general topic but couldn't remember the actual subject of the article. Anyway, without any further ado...
Turritopsis Nutricula
Turritopsis Nutricula is a hydrozoan (a class of species related to jellyfish) which reverts to its polyp stage after reproducing (technically, propagating). This means that this is the only species in the animal kingdom which is biologically immortal. It can repeat its life cycle again and again; theoretically, forever.
The only other possible example of this is species in the genus Hydra, which appear to undergo senescence (aging) very slowly, if at all.
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Wednesday, March 11, 2009
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