The Download: ChatGPT in schools, and deep sea mining

When they added just four proteins to a skin cell and waited about two weeks, some of the cells underwent an unexpected and astounding transformation: they became young again. They turned into stem cells almost identical to the kind found in a days-old embryo, just beginning life's journey. Now, after more than a decade of studying and tweaking so-called cellular reprogramming, a number of biotech companies and research labs say they have tantalizing hints that the process could be the gateway to an unprecedented new technology for age reversal. If you're planning a trip to the UK this year, these sightseeing suggestions are a good place to start. Is it even possible to pirate a river?!