For centuries the most powerful argument for God's existence from the physical world was the so-called argument from design: Living things are so beautiful and elegant and so apparently purposeful, they could only have been made by an intelligent designer. But [Charles] Darwin provided a simpler explanation. His way is a gradual, incremental improvement starting from very simple beginnings and working up step by tiny incremental step to more complexity, more elegance, more adaptive perfection.

[Richard Leakey is] a robust hero of a man, who actually lives up to the cliché, “a big man in every sense of the word.” Like other big men he is loved by many, feared by some, and not over-preoccupied with the judgments of any.

There could be something incredibly grand and incomprehensible and beyond our present understanding.

I'm fond of science fiction. But not all science fiction. I like science fiction where there's a scientific lesson, for example - when the science fiction book changes one thing but leaves the rest of science intact and explores the consequences of that. That's actually very valuable.

What are all of us but self-reproducing robots? We have been put together by our genes and what we do is roam the world looking for a way to sustain ourselves and ultimately produce another robot child.

The obvious objections to the execution of Saddam Hussein are valid and well aired. His death will provoke violent strife between Sunni and Shia Muslims, and between Iraqis in general and the American occupation forces.

I am very hostile to religion because it is enormously dominant, especially in American life. And I don't buy the argument that, well, it's harmless. I think it is harmful, partly because I care passionately about what's true.