Here in the Klondike, the drill serves as a kind of gas-powered, handheld time machine, bringing up frozen earth from the Pleistocene, when mammoths and other megafauna once ruled.

• 在克伦代克这里，以瓦斯驱动的钻孔机像是手持的时光机器，带出更新世的冰冻土壤，那是猛犸象和其他巨型动物主宰地球的年代。