In Stephen Hawking: A Biography by Kristine Larsen, he is quoted as saying that he found it to be “too descriptive and inexact.” Physics, on the other hand, was more precise and well-defined.

Elusive black hole radiation predicted by Stephen Hawking may have influenced the way the universe took shape after the Big Bang, new research suggests.

Stephen Hawking is the most famous scientist alive ... His was an active, English childhood, but at Oxford University, aged just 20 he first noticed a clumsiness that was the first indication ...