PhysicsIf you think black holes are strange, white holes will blow your mindWhite holes are black ones in reverse, spewing out matter– and they could give us our first glimpse of the quantum source of space-time, says physicist Carlo RovelliFeatures
PhysicsQuantum mechanics may contradict itself when applied to big objects Standard quantum theory explains the behaviour of microscopic things like electrons and atoms. It should also, in principle apply to larger objects – but it might not News