I asked him what he would like his legacy to be.
"I never expected to reach 75, so I feel very fortunate to be able to reflect on my legacy. I think my greatest achievement, will be my discovery that black holes are not entirely black."
"Quantum effects cause them to glow like hot bodies with a temperature that is lower, the larger the black hole. This result was completely unexpected, and showed there is a deep relationship between gravity and thermodynamics. I think this will be key, to understanding how paradoxes between quantum mechanics and general relativity can be resolved."
When asked if money or practicality were no object, what his dream present would be, he said it would be a cure for motor neurone disease - or at least a treatment that halted its progression.
"When I was diagnosed at 21, I was told it would kill me in two or three years. Now, 54 years later, albeit weaker and in a wheelchair, I'm still working and producing scientific papers. But it's been a great struggle, which I have got through only with a lot of help from my family, colleagues, and friends."
