Producer's Notes: Ice Age Bay Area

The rocks, long known as the "Sunset Boulders", have attracted rock climbers for years. I've climbed these rocks before. But like so many other people, I had no idea I was touching history. During the Pleistocene, 10 to 20,000 years ago, this place was very different than it is today, inhabited by massive mega-fauna; bigger elephants, lions, bears and wolves, than we see today.