At Pixar when we were making Toy Story, there came a time when we were forced to admit that the story wasn't great. It just wasn't great. We stopped production for five months.... We paid them all to twiddle their thumbs while the team perfected the story into what became Toy Story. And if they hadn't had the courage to stop, there would have never been a Toy Story the way it is, and there probably would have never been a Pixar.

The hard part was getting around this, this was a religion among physicists, and in fact even in the Bohr-Einstein debates, and with Schrödinger also, the universal religion was quantum mechanics makes correct predictions, period, no, off the table. What Bell's theorem and in particular our version of it, the Clauser-Horne-Shimony-Holt experimental prediction, showed that either that had to be wrong, nor Einstein's whole legacy had to be wrong. I think at the time people who were critical of doing the experiment didn't realise really what was at stake, that it was that cut and dried between two religious icons, if you will, the field of physics. Since I kind of was the inventor of the CHSH inequality and the CH inequality and all that, I knew exactly what it was all about. But it took a long time for that to filter in.

This cockroach-like existence is cumulatively intolerable even though on any given night it is perfectly manageable. “Cockroach” is of course an allusion to Kafka’s Metamorphosis, in which the protagonist wakes up one morning to discover that he has been transformed into an insect. The point of the story is as much the responses and incomprehension of his family as it is the account of his own sensations, and it is hard to resist the thought that even the best-meaning and most generously thoughtful friend or relative cannot hope to understand the sense of isolation and imprisonment that this disease imposes upon its victims.

More than anything else, I had to combat the barriers, and we tore down those barriers. I just had to set a sail against the wind, those strong winds, to end segregation and racial discrimination, but somehow, in some way, I didn’t let those barriers keep me down.

They have a lot of extreme physics going on inside them and scientists use them to test theories of relativity on a cosmic scale. Einstein’s theories are checking out pretty well so far.

The next generation of telescopes will see millions of events per night with computers that sift through huge amounts of data. If we had had access to a computer, we would never have programmed it to look for something so unexpected. How do you pick up the things you don't know exist, the things you can't tell it to look for? My project was to study quasars, and then we accidentally stumble over these things called pulsars. They were totally unexpected, totally unknown – and it's been huge fun.

My contemporaries were more upset about the Nobel than I was not to be recognised. One of them labelled it the 'No-Bell' prize! But it was fine by me. There's no Nobel Prize in astronomy and I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

I was really proud that it was my stars that had convinced the prize committee that there was good physics in astrophysics.

Yes, in 2018, I was awarded the Breakthrough Prize for the discovery. I was a bit dumbstruck, never expecting that kind of thing to happen. I was keen that the money should be used well and the best way to do that seemed to be to encourage a more diverse research student population from under-represented groups.

I was very, very thorough, making sure I really understood how that telescope worked, and that it was working properly. I was quite convinced that I wasn't clever enough to be in Cambridge and would be thrown out at some stage. My policy was to work as hard as I could so that I'd know I'd done my best. We now label this as impostor syndrome, but we didn't recognise, and certainly didn't name it, back then.