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Who's Behind the Mysterious Mojave Desert Megaphone?

Its been there for decades but no one knows who put it there nor why. Was it the U.S. Air Force, pranksters — or aliens? Plus, who built Stonehenge? And what is the Plain of Jars?

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Who's Behind the Mysterious Mojave Desert Megaphone?
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    Who's Behind the Mysterious Mojave Desert Megaphone?

    Who's Behind the Mysterious Mojave Desert Megaphone?

    The Mojave Desert is the driest desert in North America, and though it rests between Las Vegas and Los Angeles, it is remote, mostly roadless and …

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