What on Earth?
Season 4 Episode 19
Experts investigate the startling mysteries captured by satellites orbiting the Earth. In this edition, the mystery undersea disks that scientists still can't explain, a sci-fi structure the size of a town covered in a labyrinth of passageways, a ship stranded on the island that time forgot and a mystery Russian military compound
What on Earth? airs on Sky History 2 at 10:00 AM, Tuesday 4 February.
Topics
News ➝ Current Affairs
Documentary