PCR made it easier to see that certain people are infected with HIV.

If reincarnation is a useful biological idea it is certain that somewhere in the universe it will happen.

People don't realize that molecules themselves are somewhat hypothetical, and that their interactions are more so, and that the biological reactions are even more so.

My mother often mailed me articles from 'Reader's Digest' about advances in DNA chemistry. No matter how I tried to explain it to her, she never grasped the concept that I could have been writing those articles, that something I had invented made most of those DNA discoveries possible.

Here's a bunch of people practising a new set of behavioural norms. Apparently it didn't work because a lot of them got sick. That's the conclusion. You don't necessarily know why it happened. But you start there.

Art is subject to arbitrary fashion.