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What if the Earth were Hollow?

Flying in a 747 from one side of the earth to the exact opposite side would take about 22 hours… and while I know there’s a bit of rock in the way, that’s really going the long way round. So…

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Why Scientists Briefly Thought the Earth Was Hollow

People have wondered what happens inside the Earth for probably as long as there have been people. Throughout history, many cultures believed that the Earth’s interior featured great hollows that hid mystical realms — things like lost civilizations, lakes of…

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