The Download: safer space travel, and generative AI in video games

Long-distance space travel can wreak havoc on human health. There's radiation and microgravity to contend with, as well as the psychological toll of isolation and confinement. Research on identical twin astronauts has also revealed a slew of genetic changes that happen when a person spends a year in space. That's why some bioethicists are exploring the idea of radical treatments for future astronauts. Once we've figured out all the health impacts of space travel, they argue, we should edit the genomes of astronauts ahead of launch to offer them the best protection.