One test of a true clock is its ability to keep time through a wide range of temperatures. A clock that… — Jonathan Weiner

Philosophers used to ask whether we are born with or invent our sense of time. Now we know that we have clocks woven into every one of our cells. Philosophers also used to ask how we know that the sun will rise tomorrow. In a sense we have that answer built into us, too. The clock is a kind of orrery in the heart of every one of our cells, revolving to help us keep time with our world, a model of the cosmos inside our heads that cycles whether we are in or out of sight of the sun. The revolution of the stars and the seasons is written in the turns of our DNA.

People who don’t believe in relativity don’t understand relativity. People who don’t believe in evolution don’t understand evolution. And it’s the same with genetics. And I think some people are just reluctant to let their imaginations run.

My feeling is that molecular biologists are going to move into psychology and take over the field. I think that’s the way psychology is going to be rejuvenated.

“Ethicists are a mixed lot,” he says, “generally not worrying about their own problems, just somebody else’s problems.”