Jellyfish Deity
Scientists have recently discovered evidence of an immortal species of jellyfish. Apparently these little suckers revert to an adolescent phase after mating, and can do so ad infinitum. And you laughed at me when I said I was going to live to be 400!
Take heart, friends. It is now only a matter of time before we unlock the cellular secrets inside these Holy Hydrozoans and sell their special genetic heritage in an easily digestible liquid capsule that also serves as birth control while providing instant male enhancement.
By my watch, only another 65 years or so before we are all forever-living, constantly aroused quasi-squids, living in stasis tanks with wi-fi ready electrodes hooked up to each and every tentacle.
Kudos to HG Wells for figuring this out a century ago (minus the Cialis angle).