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Ice Age
he Last Glacial Period (LGP), also known colloquially as the last ice age or simply ice age, occurred from the end of the Eemian to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago. The LGP is part of a larger sequence of glacial and interglacial periods known as the Quaternary glaciation which started around 2,588,000 years ago and is ongoing. The definition of the Quaternary as beginning 2.58 million years ago (Mya) is based on the formation of the Arctic ice cap. The Antarctic ice sheet began to form earlier, at about 34 Mya, in the mid-Cenozoic (Eocene
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To understand where things went wrong, we have to go back 15,000 years to the end of the last ice age. Up until then the planet had been sparsely populated and people banded together to stave off the cold. Rather than a struggle for survival, it was a snuggle for survival in which we kept each other warm.
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Around 12,800 years ago, it was as though an enchantment of ice had gripped the earth. In many areas that had been approaching terminal meltdown full glacial conditions were restored with breathtaking rapidity and all the gains that had been made since the LGM were simply stripped away:
'Temperatures ... fell back on the order of 8-15 degrees centigrade ... with half this brutal decline possibly occurring within decades. The Polar Front in the North Atlantic redescended to the level of Cabo Fini
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― Underworld: The Mysterious Origins of Civilization
― Underworld: The Mysterious Origins of Civilization
