The Immortal Jellyfish: The Only Animal That Can Reverse Death and Grow Young Again

There is one animal on Earth that doesn't have to die of old age: the immortal jellyfish, Turritopsis dohrnii. When it grows old or is injured, it reverses its own life cycle — its body collapses back into a polyp and grows young again, through a rare cellular trick called transdifferentiation. In this documentary we follow its normal life cycle, the strange discovery of its reversal, how its cells rewind, why it isn't truly unkillable, how it spread across the world's oceans, and what its 2022 genome could teach us about human ageing.

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