Man-made objects buried under shifting sands, such as pipes or water aqueducts, are particularly good at reflecting microwaves.

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It blasted a disused weather satellite into tiny fragments that threaten the safety of other man-made objects in space.

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The debris is essentially the residue of hundreds of rocket launches, exploration missions and other man-made objects left circling Earth.

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This will allow Users to see man-made objects and groups of people.

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In the cases they present in their report, all conventional explanations of something natural or man-made had been eliminated by the authors and their associated teams of experts, and yet these objects were observed at close range by pilots, tracked on radar, and officially photographed.

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