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.
Read the open access paper here: https://advances.sciencemag.org/content/5/9/eaax4184
VUB Today: http://vubtoday.com/en/content/gigantic-asteroid-collision-boosted-biodi...
This challenging idea was covered in a Science Editorial, and summarized in the media all over the world, see below