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Humans have long sought the fountain of youth, but it was usually more philosophical than practical. Recent advances in medicine and technology have expanded the science of human aging, even though compared to life as a whole, we are embarrassingly outmatched. Despite modern humans living longer today than ever before, our understanding of what is possible is limited to our species - until now. In this spunky, effervescent debut, the immortality key is revealed to be a superpower already present on earth. With mind-bending stories from the natural world, Jellyfish Age Backwards reveals lifespans we cannot imagine and physiological gifts that feel closer to magic than reality. For example:There is a Greenland shark that was 286 years old when theTitanicsank, and is currently 390, making it older than the United States.