By Stuart A. Kauffman
By Marcus Chown
By Storm Dunlop, Wil Tirion, Royal Observatory Greenwich, Collins Astronomy
By John Gribbin
By Martin Rees
By Levin, Janna
By J. Beier
By Richard Panek
By Noel Edmonds
By Michael Frayn
By Stephen Hawking
By Sir Martin Rees
By Giles Sparrow
By Storm Dunlop, Wil Tirion, Royal Observatory Greenwich, Collins Astronomy, Collins Books
By Peter Altman
By James S. Trefil
By James Trefil
By Jo Dunkley
By Davies, John
By DK
By Professor Brian Cox, Professor Jeff Forshaw