The Ice Age is a geological period characterized by a long-term reduction in global temperatures, resulting in the expansion of ice sheets and glaciers over vast areas of the Earth's surface. There have been several ice ages throughout the Earth's history, with the most recent one occurring during the Pleistocene epoch, approximately 2.6 million to 11,700 years ago.
During the last ice age, large parts of North America, Europe, and Asia were covered in ice sheets that were several kilometers thick. The ice sheets also caused sea levels to drop, exposing land bridges that allowed humans and animals to migrate between continents.
The causes of ice ages are complex and involve a combination of factors, including changes in the Earth's orbit, variations in solar radiation, and changes in atmospheric concentrations of greenhouse gases. The current consensus among scientists is that human activities, particularly the burning of fossil fuels, are contributing to a rapid warming of the planet and are likely to disrupt the Earth's climate in ways that could have serious consequences for human societies and ecosystems.
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