Siberian hunters once relied on mammoths for their meat. Now, their tusks are the prize. These relics—exposed by climate change, and hunters' increasing efforts to dig them up—can fetch tens of thousands of dollars, inspiring a bustling trade. Read more about today's mammoth tusk trade: ngm.nationalgeographic.com/2013/04/125-mammoth-tusks/larmer-text VIDEOGRAPHER: Maxim Arbugaev PRODUCER: Shannon Sanders