I would try to write my war story, whether it was interesting or not, and try to make something out of it. I describe that process a little in the beginning of Slaughterhouse Five; I saw it as starring John Wayne and Frank Sinatra. Finally, a girl called Mary O’Hare, the wife of a friend of mine who’d been there with me, said, “You were just children then. It’s not fair to pretend that you were men like Wayne and Sinatra, and it’s not fair to future generations, because you’re going to make war look good.” That was a very important clue to me.

Working at the hospital, I found that my surgical skills were not as good as I expected. One time it took me two hours to do a surgical operation which could have been completed in 30 minutes by other surgeons. My supervisors were very tough on new residents like me, and I lost confidence in my ability.

They’re not failures, you try something and it doesn’t work, and some people, you know, get fed up with this, and I’ve known some of my friends and colleagues who have just decided to give up science because they can’t stand it, but I’ve always decided, you know, if it doesn’t work, forget it and start planning the next experiment, and that’s always exciting.

To launch Canva, we needed investment and a tech team. Finding the right people for both took two years but there is always a lot of rejection for entrepreneurs in their early days. But every time we got a hard question or a reason why people wouldn't invest, we stayed focused on what we could change. I revised our pitch deck after every meeting, more than 100 times in one year, to answer the questions or fix the reason for rejection from the last time. You just have to keep going. The normal thing to do after your 100th, 80th or even 20th ‘no’ would be to stop, but you just have to persevere.

there are really very many. Again, as a child, it was obviously those scientists which had lived in the past that had made such an important mark in science history.

I have also benefited from teaching; as I try to explain my views to students with critical and open minds, I find myself continually being challenged to go back and rethink ideas. I now see teaching and research as complementary, mutually reinforcing activities.

It’s easy to try to exaggerate the problems just to get more attention. So for me, it was very clear that the best way to deal with that was to do the best science that I was capable of doing.

Although my years at Irvine were very productive, I missed not doing experiments myself because of the many responsibilities associated with a faculty position: teaching courses, supervising graduate students, meetings, etc. After spending seven years at Irvine as Assistant and then Associate Professor, I decided to move to a non-academic position. I joined the Molecular Physics and Chemistry Section at the Jet Propulsion Laboratory in 1982. I had a smaller group – only a few postdoctoral fellows – but I also had the luxury of conducting experiments with my own hands, which I enjoyed very much.

I then converted a bathroom, seldom used by the family, into a laboratory and spent hours playing with chemistry sets. With the help of an aunt, Esther Molina, who was a chemist, I continued with more challenging experiments along the lines of those carried out by freshman chemistry students in college.

Sherry offered me a list of research options: the one project that intrigued me the most consisted of finding out the environmental fate of certain very inert industrial chemicals – the chlorofluorocarbons (CFCs) – which had been accumulating in the atmosphere and which at that time were thought to have no significant effects on the environment. This project offered me the opportunity to learn a new field – atmospheric chemistry – about which I knew very little; trying to solve a challenging problem appeared to be an excellent way to plunge into a new research area.