It's time for Unearthed 2018, where we talk about the historical things discovered or dug up in the past year. Part one includes a bunch of research into human migration patterns, mummies, mass graves, and human sacrifices, among other things.
In our annual recap, we walk through what's been literally and figuratively unearthed in 2017, including anticlimactic headlines, shipwrecks, medical finds, and a collection we've nicknamed "We told you so."
In 1971, a man calling himself Dan Cooper hijacked Northwest Orient Airlines flight 305. He received a ransom of $200,000 -- and then jumped out in midair. Over the years, the FBI has searched for Cooper with little luck. Tune in to learn more.