Scientists say they now have a much clearer picture of the climate catastrophe that followed the asteroid impact on Earth 66 million years ago. The researchers' investigations suggest the impact threw more than 300 billion tonnes of sulphur into the atmosphere.

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Scientists say they now have a much clearer picture of the climate catastrophe that followed the asteroid impact on Earth 66 million years ago. The researchers' investigations suggest the impact threw more than 300 billion tonnes of sulphur into the atmosphere.