According to the Milankovitch theory, variations in Earth's orbit and axial tilt can trigger long-term climatic changes and prompt the start and end of ice ages.

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This is the main premise of the Milankovitch theory, which suggests that variations in Earth's axial tilt, precession, and orbital eccentricity can alter the amount and distribution of solar radiation received by the Earth, triggering cycles of glaciation and deglaciation over thousands of years.

According to the Milankovitch Theory, Variations in Earth's Orbit and Axial