In this edition of The Naked Scientists: US scientists have turned skin cells into human embryos for the very first time. We unpack the significance. Also ahead, the legacy of the primatologist and conservationist, Jane Goodall, who has died at the age of 91. Plus, we hear from a chemist who believes he has cracked the mystery of ghostly lights we call will-o'-the-wisps... Like this podcast? Please help us by supporting the Naked Scientists