The third episode of the first series of BBC Radio 4's The Infinite Monkey Cage, in which physicist Brian Cox and comedian Robin Ince take a witty, irreverent and unashamedly rational look at the world according to science. Originally broadcast on 14 December 2009.

In this episode, Quantum Theory, Astrology, CERN, physicist turned comedian Ben Miller joins Brian and Robin to discuss quantum physics, and to explore whether astrology really shares its roots with more scientific pursuits. They also discuss the largest scientific experiment ever undertaken, currently storming ahead in a large underground tunnel just outside Geneva.