Within the vast, sun-scorched sands of the Atacama Desert lie ancient geoglyphs—carvings etched into the hillsides more than 1,000 years ago by Indigenous groups in northern Chile. But now, these archaeological wonders are threatened by the wheels of off-road vehicles,

"This landscape has stayed the same for 25 million years," says archaeologist Gonzálo Pimentel of Chile's Atacama Desert. The blistering sun and scant rain have left the desert little changed until about a thousand years ago,