Rev. Timothy Keller spent nearly 30 years reaching out to skeptics in New York City. Here's what he's learned.

We all know the stats, but what's behind the numbers?

Last weekend, I participated in a Ragnar Trail Event in Zion, Utah. It was a beautiful spiritual experience, though you might not think about running or racing as "spiritual."

If chimpanzees -- our nearest evolutionary relatives--are expressing an inherent primate religiosity with these stone gathering rituals, might it be the case that we share a genetic predisposition for religion?