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Today we dismiss flat-Earthers as ignorant, yet we may be making an almost identical mistake – not about our planet, but about the entire universe

(Image: Garry Wade/Stone/Getty)

FOR centuries the ancients believed the Earth was flat. Evidence to the contrary was either ignored or effortlessly integrated into the dominant world view. Today we dismiss flat-Earthers as ignorant, yet we may be making an almost identical mistake – not about our planet, but about the entire universe.

When it comes to the universe, “flatness” refers to the fate of light beams travelling large distances parallel to each other. If the universe is…

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