https://www.johndcook.com/blog/2026/04/09/pyramid-speed-of-light/

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The Great Pyramid of Giza and the Speed of Light

Posted on 9 April 2026 by John

Saw a post on X saying that the latitude of the Pyramid of Giza is
the same as the speed of light.

I looked into this, expecting it to be approximately true. It's
exactly true in the sense that the speed of light in vacuum is
299,792,458 m/s and the line of latitude 29.9792458deg N passes through
the pyramid. The exact center of the pyramid is at 29.97917deg N,
31.13417deg E.

Of course this is a coincidence. Even if you believe that somehow the
ancient Egyptians knew the speed of light, the meter was defined four
millennia after the pyramid was built.

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One thought on "The Great Pyramid of Giza and the Speed of Light"

 1.
    Egg Syntax
    10 April 2026 at 07:56

    Scott Alexander has a nice short essay on this from long ago:
    https://slatestarcodex.com/2016/11/05/the-pyramid-and-the-garden/

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