1Killer Asteroid
2Supervolcano
National Geographic Naked Science presents "Super Volcano", the inside documentary of what might happen if the Yellowstone Caldera were to erupt one day. This documentary includes a Yellowstone timeline of past eruptions, how Yellowstone would affect the world, and what impact will it be for the U.S.
3Angry Earth
4Who Built Stonehenge?
5The Deadliest Shark
6Bermuda Triangle
7Atlantis
8Alien Contact
A mysterious crash in Roswell, NM during the 1940s convinced many that our planet is being visited by space aliens. Crop circles in Britain have only added fuel to the fire. Few scientists doubt that life indeed exists elsewhere, but some believe we're more likely to make contact via radio waves.
9Angry Skies
10What is Human?