via unknowncountry by astrieber on 3/30/12
In a recent NASA satellite survey of Egypt, archaeologists discovered 17 pyramids that had been buried in the sand, as well as more than 1,000 tombs and 3,000 ancient settlements. Ground level excavations have already confirmed the existence of two of the pyramids. Ancient Egyptian buildings were made of mud brick, which is denser than the sand surrounding them, which allowed the satellites to spot the buried shapes. The scientists think that, using satellites, they may eventually discover an entire lost city.
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