We know cancer is caused ultimately via a link between the environment and genes. There are genes inside cells that tell cells to grow and the same genes tell cells to stop growing. When you deregulate these genes, you unleash cancer. Now, what disrupts these genes? Mutations.

I think the cardinal rule of learning to write is learning to read first. I learned to write by learning to read.

The history is important because science is a discipline deeply immersed in history. In other words, every time you perform an experiment in science or in medicine, what you're actually doing is you're answering someone, answering a question raised by someone in the past.

Writing anything as an expert is really poisonous to the writing process, because you lose the quality of discovery.

And again, President Obama's health care plan really is another drag on the economy. Until we get Washington out of the way, this president's recovery is going to continue to rank dead last.

This coupling together of science with international peace, is, I think, particularly significant.

My assumption was that people are already motivated to go to a fitness class. That's who I am. I was already ready to go out there and get to class. All I needed was a search tool. But it turns out people need more than that, and that's why gym memberships exist.

In the past, it was only in science fiction novels that you could read about ordinary people being able to go to space... But you laid the foundation for space tourism.