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Space

Submission + - Ice Age Triggered by Proximity to Sun (geologytimes.com)

webdoodle writes: "Analysis of Antarctic ice cores shows that the last four great ice age cycles began when Earth's distance from the sun during its annual orbit became great enough to prevent summertime melts of glacial ice. The absence of those melts allowed buildups of the ice over periods of time that would become characterized as glacial periods."

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