Rejuvenation in the Jellyfish Turritopsis Dohrnii
Updated: 2012-11-29 23:09:11
Aging has evolved despite its terrible effects on the individual because over the long run it is highly effective in the evolutionary competition that takes place in most ecological niches - any amount of hardship and pain can be selected for if it means that genes are more effectively propagated. There are exceptions, however, in the form of successful species that do not appear to age; especially in the case of lower animals we can find life histories that look nothing like our own. Take the hydra, for example, or here the tiny jellyfish Turritopsis dohrnii: [An individual Turritopsis dohrnii...