HumansAustralia's oldest known rock art is a 17,000-year-old kangaroo A large, life-like painting of a kangaroo on the ceiling of a rock shelter is the oldest known painting in Australia, and was dated using ancient wasp nests News
TechnologyA hydrogen fuel revolution is coming – here's why we might not want it Hydrogen is widely touted as a green fuel for everything from cars and planes to heating homes. But all too often it has a dirty secret Features