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ice age |
Also found in: Encyclopedia, Wikipedia, Hutchinson | 0.01 sec. |
ice age n (Earth Sciences / Geological Science) another name for glacial period
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| Polar bears have survived previous Arctic warming periods, including the last warm stretch between ice ages some 130,000 years ago, but some experts say that nothing in the species' history is likely to match the extent of warming and ice retreats projected in this century and beyond, should emissions of heat-trapping gases continue unabated. Would major reorganizations of ocean currents tend to cause ice ages by temporarily disrupting the flow of warm water that normally keeps the ice at bay? After all, many scientists think that a slowing of ocean circulation may be the switch that triggers the onset of Ice Ages. |
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