An Alabama cave system may contain the largest examples of Native American cave art found in North America, researchers say. Simek and others have been studying a site known only as the “19th ...

New drone images offer a glimpse of the otherworldly Han Son Doong cave in Vietnam. Photographer Ryan Deboodt told USA TODAY Network that it took him two days to hike into the cave with his equipment.

One image in the cave is more than 10 feet long. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Archaeologists in Alabama have discovered ...