Anyway, for some years I've thought that it would be a good sf premise to have a technology of regeneration for humans where the way to undo aging is to revert to an infant, then mature at the normal rate, with memories from earlier lives coming back at around age 15.
The result would be societies where the arrangements for being taken care of when reverted would be extremely important, and there'd probably be a bunch of different systems-- blood family, chosen family, commercial..... There'd be long loyalty and long revenges.
The real world is potentially more dramatic than the idea I started with, since severe trauma is one of the things which can start jellyfish reversion. I assumed there'd just be a medical procedure.
Link thanks to thnidu.
andrewducker sent a link suggesting that jellyfish may have some ability to remember.
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