PhysicsExtremely cold drop of helium can be levitated forever A drop of very cold liquid helium can be made to float for an indefinitely long time using strong magnets and quantum effects News
PhysicsWhy symmetry is so fundamental to our understanding of the universe The symmetries of matter are deeper and stranger than they first appear, and they have driven many of the biggest breakthroughs in particle physics. But have we exhausted their usefulness? Features