Stephen Hawking had a brilliant response when asked if he had an equation for time travel

Oh the things you could do with an equation for time travel...
Stephen Hawking had a brilliant response when asked if he had an equation for time travel
Hawking may not have had the equation for time-travel, but he did have a great sense of humour. Credit: ANDREW COWIE/AFP/Getty Images

Stephen Hawking's sense of humour is well-documented.

Following the death of the legendary cosmologist on Wednesday, the Twitter account "Letters of Note" shared a letter he wrote to The Face Magazine in 1995.

An excellent response.

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