Jeopardy fans, here's your category: The Sanford Underground Science Lab.
The lab will be featured on Friday night's episode of the popular TV game show.
The "Clue Crew" traveled underground to the Lab in October, where they filmed the clues in various locations, including the 4,850 level.
An entire category is dedicated to the science that takes place at the lab.
Here's an example of one of the questions:
The double walled titanium cylinder acts as a thermos so this gas, the "X" in the LUX experiment stays liquid. Scientists hope some elusive dark matter will bump into an atom of it.
To hear the answer and see how the college contestants fair, watch KOTA Television at 6:30 p.m.