Unexplored caves can store a wealth of information about the past. Here we talk with Dr. Tim Heaton who studies the Ice Age mammals found in caves. He got his start exploring the caves of the Colorado Plateau, and currently live here in Moab. Of his multiple scientific accomplishments, one of his best known is the discovered of 10,000 year old human remains in a cave on on island off of Alaska, making them one of a handful of the oldest human remains found in the Americas. Here we talk with him about that discovery and why this site helps us understand how humans came to populate the Americas.