Scientists reveal the cause of Earth's last ice age

At the beginning of the last ice, local mountain glaciers grew and formed large ice sheets, like the one seen here. (CREDIT: Creative Commons)

For quite some time, paleo-climate specialists have been perplexed by two enigmas: What was the origin of the ice sheets that defined the final ice age, and how could they expand so rapidly?

Fresh research conducted by University of Arizona's experts suggests a plausible explanation for the swift expansion of the ice sheets that coated a considerable portion of the Northern Hemisphere during the last ice age. Furthermore, the study's findings may be applicable to other glacial periods in the Earth's past.

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