They ruled the vast grasslands of Eurasia for a thousand years, striking fear into the hearts of the ancient Greeks and Persians. But they left no cities or settlements behind, only massive grave mounds, called kurgans, dotting the steppes from Mongolia to the Black Sea. Now one of those kurgans, located in the Caucasus Mountains of southern Russia, has yielded an intriguing discovery: golden artifacts that are shedding light on the shadowy world of the Scythians, fierce nomads whose exploits—and drug-fueled rituals—were chronicled by the Greek historian Herodotus.