It does this through a cell development process of transdifferentiation
Theoretically, this process can repeat indefinitely, making it biologically immortal
So I am kind of wondering if one day science will be able to make humans biologically immortal. The process of transdifferentiation has something to do with stem cells and we have stem cells so you never no. Cheers!
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http://en.wikipedia.org/wiki/Turritopsis_nutricula

