Most theorists suspect that space has an intricate structure - that it is 'grainy' - but that this structure is on a much finer scale than any known subatomic particle. The structure could be of an exotic kind: extra dimensions, over and above the three that we are used to (up and down, backward and forward, left and right).

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Martin Rees was a contemporary British cosmologist and astrophysicist. Martin John Rees, Baron Rees of Ludlow, is a British cosmologist and astrophysicist. He was the fifteenth Astronomer Royal from 1995 to 2025, Master of Trinity College, Cambridge, from 2004 to 2012, and President of the Royal Society from 2005 to 2010. Read more on Wikipedia →

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