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Particle physicists Jeff Forshaw, left, and Brian Cox in London. Photograph: Katherine Rose for the Observer

Brian Cox and Jeff Forshaw explain the big bang

What is infinity? Is the Milky Way omelette-shaped? Readers ask particle physicists Brian Cox and Jeff Forshaw to unscramble some of the universe’s mysteries

It was a scientific match made if not in heaven, then in manmade conditions approaching the big bang: Brian Cox and Jeff Forshaw first met at a particle collider in Hamburg 15 years ago. They have collaborated on various scientific projects ever since and are now both professors at Manchester University’s Particle Physics Group and are involved in research projects at Large Hadron Collider at Cern, Geneva.

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You can also listen to a 6-minute audio of Prof Brian Cox talking on BBC Radio 4’s Today programme by clicking on this link: Professor Brian Cox: Quantum physics ‘is not difficult’.