PhysicsThe age of giant particle accelerators like the LHC may be overEnormous particle colliders probe the nature of reality, but much smaller laser-powered plasma accelerators could soon render them obsoleteFeatures
PhysicsMars meteorite assault stopped 500 million years earlier than thought The Late Heavy Bombardment may have stopped on Mars 4.48 billion years ago, allowing it to become more favourable to life earlier than previously suggested 51¶¯Âþ