There is no example of someone reading their scripture and saying, 'I have a prediction about the world that no one knows yet, because this gave me insight. Let's go test that prediction,' and have the prediction be correct.

There is always a place I can take someone's curiosity and land where they end up enlightened when we're done. That's my challenge as an educator. No one is dumb who is curious. The people who don't ask questions remain clueless throughout their lives.

In all civilizations we've studied, all cultures that we know of across the Earth and across time have invested some kind of attempt to understanding where where, where they come from, and where they are going.

Let's say intelligence is your ability to compose poetry, symphonies, do art, math and science. Chimps can't do any of that, yet we share 99 percent DNA. Everything that we are, that distinguishes us from chimps, emerges from that one-percent difference.

There's a science to brain development. The brains of teenage boys are crowded with impulse and adrenaline. By the time they hit their 20s, their brains are dominated by conscience and reason.

The discovery of HIV in 1983 and the proof that it was the cause of AIDS in 1984 were the first major scientific breakthroughs that provided a specific target for blood-screening tests and opened the doorway to the development of antiretroviral medications.

In the spring of 1959, I received an offer of a professorship at Harvard, which I accepted with alacrity since I wanted to be near my family and since the chemistry department at Harvard was unsurpassed.

I couldn't have gotten sober without rehab because I needed the science.