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Mayan stargazers tracked Venus to schedule events

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To perfectly time major societal milestones, Mesoamerican sky-watchers didn't bother with the sun; they intensely stalked the planet Venus. They calculated its staggeringly complex 584-day cycle with such horrific, decimal-perfect accuracy using just the naked eye and a lot of math that modern computers literally can only confirm they were absolutely right.

Mayan stargazers tracked Venus to schedule events
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