So I decided I was going to invest my time. I spent Monday through Thursday at Frito-Lay, commuting from New York to Texas. Then Friday, Saturday and Sunday, I did my regular job in New York. It was an incredible commitment of time but it was an amazing developmental experience. It was challenging, broadening, and helped me reach the position I have today.

Well, it is of course a step-by-step process that started back in the 80s. I was struggling to retrieve a little bit of DNA from things that were just a few … starting with just dried tissues that, you know, that were just a few months old, going back in time and struggling with the technological issues with that over a decade. And then it became possible to retrieve DNA from things like the mammoths or cave bears that lived at a similar time as the Neanderthals. And then I was very lucky to get a job in Germany, where of course Neanderthals is a big presence in our, in the imagination of people, so it was then very, an obvious next step, in a way, to try to do that.

My training took seven years. I didn’t learn how to make sushi for the first three years. I only got two days off a month, and slept on the restaurant floor. But I loved the job. I’d go to the fish market every morning. I got to open the restaurant and see the customers. I’d watch my mentor making sushi and would copy him under the table, practising with my fingers.

My job was basically to be a delivery boy for all kinds of things, but they also — because I was at Georgetown and studying international affairs, I was assigned to read six newspapers a day and clip the most relevant articles. This is the technology we used. You couldn’t scan articles. There was no “online.” There was nothing, right? So I would read the newspapers, clip the articles I thought they ought to read, put them on a routing slip, which had on it the names of the senior staff of the committee and all the senators who were committee members. And I would send it to the senior staff, and they would decide whether to send any of them on, but I don’t think I’d have won a Rhodes Scholarship if I hadn’t been a clerk on the Foreign Relations Committee. Nobody else I was competing with read six newspapers a day, and they actually paid me good money to read The Washington Post, The New York Times, The Washington Star, which existed then, The Baltimore Sun , The St. Louis Post Dispatch , and then we alternated — and — oh, and The Wall Street Journal . We read them every day. Those were the six papers we read. I did, and then that’s what the senators got.

At first the research did not seem to be particularly interesting – I carried out a systematic search for processes that might destroy the CFCs in the lower atmosphere, but nothing appeared to affect them. We knew, however, that they would eventually drift to sufficiently high altitudes to be destroyed by solar radiation. The question was not only what destroys them, but more importantly, what the consequences are.

I certainly want to continue trying to understand how the global environment functions. The earth as a system is a very complicated one. And to understand it, we need very many disciplines, very many different scientists working together. I want to continue working with my specialty, which is chemistry, with the atmosphere. There is still much to learn about chemical reactions that occur out there in the air, in the atmosphere. So one of my projects now is to really learn more about this pollution that occurs in cities and that is spreading more through the globe. To learn it in enough detail so we can better tackle it, we can better come up with new ways of using energy, for example, that are not so damaging to the environment.

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.

The advice that I would give is try to find something that you like. Try to devote your energies to being very good at it. Try to achieve excellence. Don’t necessarily have as a goal success or getting prizes or whatever, but just doing very good work. And work hard. Keep working at it. Be patient. Realize that you don’t always see the benefits of what you’re doing, short-term. But in the end, the activities that I do, for example, scientific research, can be extremely rewarding. It’s really a very fascinating career.

I had a number of very good teachers in high school, in fact. Some mathematics teachers that perhaps allowed me the freedom to go beyond the normal routine of the class and to explore some more advanced areas. The same thing happened in college. I was able to communicate with a few of my teachers and professors, and go beyond the normal expectations. And then, as I mentioned before, Professor Pimentel, my mentor for graduate studies, was really influential in terms of the influence that he had for me.

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.