SpaceSearching for life on Mars isn’t worth the risk to Earth The Mars Sample Return mission aims to retrieve samples of Martian rock and soil to look for signs of life – but a rethink is needed to ensure Earth’s biosecurity, says Paul Marks Comment
MindWhy I’m teaching balls of human brain cells to play video games Brett Kagan is studying mini-brains in a dish as they play simple video games, hoping they will help us understand how human memories form and lead to a new kind of artificial intelligence News