I had such failure for the first ten years in Silicon Valley. General Magic — over a billion dollars invested in 1990 dollars! Could you imagine what that is today? The best team in the world. We were told we were gonna topple Microsoft and all these companies.

In the end, I had to pay $3.3 million dollars to buy back that 90%.

I had self doubts when I was a freshman in high school. I was 14 years old and not very mature, and there were a few incidents in my freshman year. I learned in a very competitive environment. The high school environment that I played in was very intense, and I learned how to be stoic and go out and compete.

I never thought that we would fail or that I would fail. I knew from time to time we may make some blunders. We may make some mistakes, but we were not going to fail.

From one particular piece of the sky an unclassifiable signal sometimes recurred and my brain started to say: “You’ve seen something like this before, haven’t you? You’ve seen something like this before from this bit of the sky , haven’t you?” I got out previous recordings from that bit of sky. It often wasn’t there, but when it was, it was keeping its place amongst the stars.

Tony was cautious. He suspected I’d wired the radio telescope up wrong. So we checked on another radio telescope on the site. The thing was pulsing nicely on mine but as we stood by the pen recorder of this other telescope, nothing happened. It was a horrible moment. And suddenly there it was, five minutes later because we had miscalculated when the telescope would see it. If we’d miscalculated by 25 minutes, we’d have all gone home and the story would be different.

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.

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.