About what percentage of Earth's land surface was covered by glaciers during the Quaternary period?

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During the Quaternary period, which began approximately 2.6 million years ago, Earth experienced multiple glacial cycles, with ice sheets covering significant portions of the planet's land surface. While it is difficult to determine an exact percentage, studies estimate that roughly 30% of the Earth's land surface was covered by glaciers during this time.

About What Percentage of Earth's Land Surface Was Covered by Glaciers