When a large asteroid hit the Earth 66 million years ago, it sent huge curtains of dust flying tens of kilometres up into the air that quickly covered the planet
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https://www.newscientist.com/article/2238677-dino-killing-asteroid-choked-whole-world-in-dust-within-a-few-hours/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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