Paper title: An extraterrestrial trigger for the mid-Ordovician ice age: Dust from the breakup of the L-chondrite parent body. A large collision in the asteroid belt between Mars and Jupiter likely sent a huge amount of dust into the atmosphere triggering a global cooling, formation of large ice-caps, sea-level fall as well as a major faunal turn-over some 466 million years ago.
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This challenging idea was covered in a Science Editorial, and summarized in the media all over the world.