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Mar 11, 2015 · Learn about the causes, characteristics and consequences of ice ages, periods of colder global temperatures and glacial expansion. Explore the history of ice age theory, the origins of human adaptation and the extinction of megafauna.
3 days ago · ice age, any geologic period during which thick ice sheets cover vast areas of land. Such periods of large-scale glaciation may last several million years and drastically reshape surface features of entire continents. A number of major ice ages have occurred throughout Earth history.
- The Editors of Encyclopaedia Britannica
May 24, 2017 · An Ice Age is a period in which the earth's climate is colder than normal, with ice sheets capping the poles and glaciers dominating higher altitudes. Within an ice age, there are varying pulses of colder and warmer climatic conditions, known as 'glacials' and 'interglacials'.
- Emma Groeneveld
Sep 28, 2021 · An ice age is a period of protracted lower temperatures that leads to significant ice formation on Earth. Learn about the six major ice ages in Earth's history, their causes, variations and effects on climate and life.
- Michael Petterson
Feb 7, 2006 · Ice Age, the Pleistocene epoch of geologic time, during which periodic, extensive glacial activity occurred in many parts of the world. The Pleistocene is generally considered to encompass the time beginning 1.65 million years ago and ending 10 000 years before the present.
Sep 28, 2021 · Learn about the definition, variations, causes and history of ice ages on Earth. Ice ages are periods of protracted lower temperatures and significant ice cover that last for millions to tens of millions of years.
Feb 3, 2021 · Learn how Earth's tilt, orbit and wobble affect the amount of solar radiation and ice formation. Find out why we're in an interglacial period now and what global warming means for the future of ice ages.
