PhysicsThere is a weird new state of matter that can't be stirred or pushed Rigid light is a strange new state of matter. It’s somewhere between a solid and a superfluid, and can’t be stirred, rotated, or even pushed News
VideoThe legacy of Stephen Hawking Stephen Hawking did more in his lifetime to advance our understanding of gravity than anyone since Einstein – and much more besides. Join Martin Rees, Marika Taylor, Stuart Clark and Tom Shakespeare as they explore the legacy of the greatest physicist of our age Video