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Well, of course I would choose to be the top scientist in my field.

I feel privileged to be a U.N. ambassador. It gives me an opportunity to use my voice to help raise awareness about important social and environmental issues.

I think becoming a scientist is the product of parents who gave me enormous opportunities to master nature.

I've always had a natural affiliation with nature. If I wasn't an actor, I'd be some sort of biologist working in the field in Africa or something.

My childhood and adolescence were filled with visiting scientists from both India and abroad, many of whom would stay with us. A life of science struck me as being both interesting and particularly international in its character.

I was a political science major in college and dreamed of being a diplomat.

But while doing that I'd been following a variety of fields in science and technology, including the work in molecular biology, genetic engineering, and so forth.

I am a scientist. Mine is a professional world that achieves great things for humanity.

A lot of my role is advocacy, and as a scientist, you're an advocate, too, because you are coming up with a theory and having to convince your fellow scientists that you're right.

I'm an ambassador 24 hours a day.