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Imagine if we had stopped science in 1904. Yes, there would have been no nerve gas and no Bhopal, but there would also have been no penicillin. All science is a trade-off.

Prior to penicillin and medical research, death was an everyday occurrence. It was intimate.

Drug discovery is terribly expensive, just to find out how one drug could or could not work and all its side effects.

The majority of modern medicines originate in nature. Although some mushrooms have been used in therapies for thousands of years, we are still discovering new potential medicines hidden within them.

Arsenic sticks around and today it's easily found after death if somebody thinks of looking for it, because the problem with arsenic, it isn't looked for in the common tests for drugs.

In the development of antibiotics, the soil microbiological population has contributed more than its share. It is to the soil that the microbiologists came in search of new antibacterial agents.

I have vowed never to take antibiotics again unless I really need them. I also learned to pay attention to my body, know the difference between indigestion, an allergic reaction to food, a parasitic infection or worms. It's incredible how well I know my body. I really love that.

In my own house, I rigged up a laboratory and studied chemistry in the evenings, determined that there should be nothing in the manufacture of steel that I would not know.

You can find bacteria everywhere. They're invisible to us. I've never seen a bacterium, except under a microscope. They're so small, we don't see them, but they are everywhere.