What on Earth?WW

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What on Earth?

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Finding Vietnam's Lost POWs

Season 2 • Episode 1

Desperate signs from lost veterans in Vietnam captured by satellite. A fleet of massive ships stranded in the middle of a vast desert. Strange walls stretching vast distances across Northern California. Just what on earth are they?

43 min|TV-PG|Premiered 01/27/2016

Available Full Episodes

More from this Episode

It appears to be the size of Australia, and it moves across Earth’s surface. It disappeared after 4 hours.WWW

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Outrageous Acts of ScienceW

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