Shortlisted for the Royal Society Science Book Prize 2023 A deep-dive into the astonishing nature and true science of longevity. Molecular Biologist Nicklas Brendborg takes us on a journey from the farthest reaches of the globe to the most cutting-edge research to explore everything the natural world and science have to offer on the mystery of aging. From the centuries-old Greenland shark and backwards-aging jellyfish to the man who fasted for a year and the woman who successfully edited her own DNA, this book follows the thread of every experiment, story, and myth in the search for immortality. With mind-bending discoveries and physiological gifts that feel closer to magic than reality, Jellyfish Age Backwards will reshape everything you thought you knew about aging - and offer nature's secrets to unlocking your own longevity.