GLACIALPERIOD
Glacial period
A glacial period is an interval of time within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The last glacial period ended about 15,000 years ago; The Holocene epoch is the current interglacial.The above text is a snippet from Wikipedia: Glacial period
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