LifeTurtles keep a record of nuclear activity in their shells Tortoises and turtles accumulate uranium isotopes in their shells, which could provide a reliable record of historical nuclear activity News
CommentThe Universe in a Box review: Why all cosmic quests start on laptops Grasping anything much about our universe depends on complex computer models that can simulate reality. Andrew Pontzen was sceptical about such simulations but now, as his new book shows, he's an enthusiastic guide Culture