The Grand Canyon’s Caves Are Full of Sloth Dung and Mummified Bats
Many of the millions of visitors snapping selfies on the Grand Canyon’s rim have no idea that the ruddy limestone cliffs are pockmarked with caves. “There’s really more caves in the Grand Canyon National Park than any other place,” says Jim Mead, a paleontologist and director of The Mammoth Site in South Dakota. Carlsbad Caverns,…




















