What on Earth?
Nazi Stonehenge (4x16)
Air date: Feb 13, 2018
A mysterious Stonehenge-like structure in Russia may have links to the Nazis; experts uncover clues to a mega-tsunami with the power to devastate the United States; a huge lake appears in the Sahara overnight.
- Premiered: Feb 2015
- Episodes: 163
- Followers: 23
- Running
- Science Channel
- Tuesday at 21