The global Muslim population is relatively young with a high fertility rate.
Rev. Timothy Keller spent nearly 30 years reaching out to skeptics in New York City. Here's what he's learned.
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?
Based on these trends, the future of religion in America probably isn't a church.
But the percentage of religious "nones" continues to rise.
And the majority of them say they are unlikely to return to the church.
Portland tops the list.
Hint: It's probably Catholic or religiously unaffiliated.