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Why do some scientists say that the moon may have been important for the evolution of human life?

User Michy
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The moon is large and is close enough that it is able to reduce the amount of variance in Earth's tilt. Long-term evolutionary theory requires that organisms have a healthy environment to survive for prolonged periods of time, with normal seasons and gradual large-scale tweaks. By keeping our planet's tilt stable, the Moon allowed the Earth to keep those conditions.
User Goddamnyouryan
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