Richard Dawkins urges all atheists to openly state their position — and to fight the incursion of the church into politics and science.

Richard Dawkins makes a case for “thinking the improbable” by looking at how the human frame of reference limits our understanding of the universe.

Hawking asks some Big Questions about our universe — and discusses how we might go about answering them.

Wright explain(s) why we appreciate the Golden Rule, why we… ignore it and why there’s hope that, in the future, we might all have the compassion to follow it.

Jared Diamond talks about the signs that collapse is near, and how — if we see it in time — we can prevent it.

Dennett takes on The Purpose-Driven Life, disputing its claim that, to be moral, one must deny evolution.

His new book, Denialism, asks why we have increasingly begun to fear scientific advances instead of embracing them.

Sam Harris argues that science can — and should — be an authority on moral issues.

Louise Leakey asks, “Who are we?” The question takes her to the Rift Valley in Eastern Africa, where she digs for the evolutionary origins of humankind — and suggests a stunning new vision of our competing ancestors.

Michael Shermer says the human tendency to believe strange things boils down to two of the brain’s most basic, hard-wired survival skills.