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3 févr. 2021 · Ice ages are periods of global cooling and glaciation caused by changes in Earth's orbit, tilt and wobble. Learn how ice ages affect climate, ocean currents and CO2 levels, and why we are in an interglacial now.
1 sept. 2019 · Ice ages are driven by a complex, interconnected set of factors, involving Earth's position in the solar system and more local influences, like carbon dioxide levels. Scientists are still...
10 déc. 2020 · Scientists used diatoms' nitrogen isotopes to trace nitrogen concentrations in Antarctic surface waters over the past 150,000 years. They found that weaker upwelling kept more CO2 in the deep ocean during the ice ages, explaining the lower atmospheric CO2 levels.
The Last Glacial Period (LGP), also known colloquially as the Last Ice Age or simply the Ice Age, occurred from the end of the Last Interglacial to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago.
1 janv. 1997 · Between 36 and 20 million years ago the Earth experienced the first of three major cooling steps. At this time a continental-scale temperate ice sheet emerged in East Antarctica....
15 juin 2016 · An ice age is a time when a lot of the Earth's water is frozen in glaciers. It happens when the northern hemisphere gets less summer heat from the Sun, but climate change has delayed the next one. Learn how ice ages shaped human evolution and what would happen if we had another one.
11 mars 2015 · The origins of ice age theory began hundreds of years ago, when Europeans noted that glaciers in the Alps had shrunk, but its popularization is credited to 19th century Swiss geologist Louis...
