Ötzi: Everyone's Favorite Copper Age Man

This 5,000-year-old man, dubbed Ötzi, was discovered on the Similaun Mountain on the Austrian-Italian border. Leopold Nekula / Sygma via Getty Images

In 1991, two hikers in the Alps found a mysterious body. The frozen mummy turned out to be a 5,300-year-old man -- a discovery that's given researchers an unprecedented peek into the Copper Age. Tune in to learn more about the Iceman.