Final answer:
The last ice age reached its peak around 20,000 years ago, during the Pleistocene Epoch.
Step-by-step explanation:
The last ice age, also known as the Pleistocene Epoch, reached its peak around 20,000 years ago. This period was characterized by large sheets of ice covering significant portions of North America, Europe, and Asia. The ice age had a major impact on the landscape, shaping mountains, carving valleys, and creating vast lakes.
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