From left: Chemist and Nobel Laureate Sir Harold Kroto, Commander of the Cosmonauts team Alexi Leonov, Evolutionary Biologist Dr Richard Dawkins, former Queen guitarist Dr Brian May, Theoretical Physicist Professor Stephen Hawking and Astrophysicist Professor Garik Israelian gather on stage ahead of the announcement of the Stephen Hawking medal for science, 'Starmus' on December 16, 2015