Deep in a damp cave in northern Alabama, archaeologists have made a giant discovery. On a subterranean ceiling just half a meter high, researchers have uncovered the largest cave art discovered in North America: intricate etchings of humanlike figures and a serpent, carved by Native Americans more than 1,000 years ago.
“It’s exemplary and important work,” says Carla Klehm, an archaeologist at the University of Arkansas, Fayetteville (UAF).