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Did ancient humans live alongside robot monsters? - What On Earth

Ancient carving of a humanoid figure

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Experts can't believe their eyes when satellites discover a giant robot carved into a mountain! Is this evidence that ancient humans did battle with ginormous mechs? Hundreds of satellites orbit Earth and capture the world like it’s never been seen before, revealing phenomena that defy explanation. 'What On Earth' explores these unusual images as scientists attempt to explain mysteries seen from space.