PhysicsCloud of atoms goes beyond absolute zero The existence of negative temperatures on the Kelvin scale could help us understand dark energy as well as revise the thinking about what temperature really is 51¶¯Âþ
SpaceAstrophile: A baby solar system with big ambitions The infant should grow up into a sun-like star, and is surrounded by enough matter to make at least seven Jupiters 51¶¯Âþ