About 466 million years ago, long before the age of the dinosaurs, the Earth experienced an ice age that was caused by global cooling, triggered by extra dust in the atmosphere from a giant asteroid collision in outer space. - discu.eu

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About 466 million years ago, long before the age of the dinosaurs, the Earth experienced an ice age that was caused by global cooling, triggered by extra dust in the atmosphere from a giant asteroid collision in outer space. https://advances.sciencemag.org/content/5/9/eaax4184 4 comments 18/9/2019 science