Season 12 Episodes10
Cast2
S
Steven Kearney
Narrator

Andrew Gough
Self
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Satellite images capture an enormous X shape mysteriously carved with precision in the remote Nevada desert; experts investigate a military emergency landing field linked to one of the most astonishing test programs in aviation history.
Steven Kearney
Narrator

Andrew Gough
Self
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"Nevada's Mystery Marking" is episode 7 of What on Earth? season 12. It aired on February 23, 2023.