Humans have always been fascinated by the idea of cheating death. We’ve looked to everything from religion, the planets, cryogenics and even the mythical foundation of youth, to no avail.

In the Mediterranean lives a jellyfish with an extraordinarily rare ability — it can rewind it’s life cycle. The so-called ‘immortal’ jellyfish, or Turritopsis Dohrnii, can somehow reprogram the identity of it’s cells, returning it to an earlier stage of life.

BBC Earth