What I remember most about Jacques Cinq-Mars the first time we met was his manner—one part defiance, one part wariness. It was 1994, and I had just flown into the small village of Old Crow in northern Yukon; Cinq-Mars was waiting in the tiny airport. Tall, grizzled, and unshaven, the French-Canadian archaeologist looked every bit the old Yukon hand.
Still fit in his early 50s, he worked as a curator at what is now called the Canadian Museum of History in Gatineau, Quebec. But Cinq-Mars lived for summer fieldwork, combing Yukon riverbanks and rock shelters for traces of Ice Age hunters. In three hollows known as the Bluefish Caves, he and his team had discovered something remarkable—the bones of extinct horses and woolly mammoths bearing what seemed to be marks from human butchering and toolmaking. Radiocarbon test results dated the oldest finds to around 24,000 years before the present.