What On Earth?

Sometimes, the greatest mysteries revealed by satellites aren't what you can see, but what you can't. Why does a town appear on maps for decades, yet it is invisible from space.

About the programme: Satellites orbit Earth at 17,000 miles an hour, capturing images of our world that are breathtaking, but some are bizarre. This unique perspective reveals objects that seem to make no sense & phenomena that defy explanation. Such images force the question, what on Earth is that?

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