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  • 443 Million Years Ago...
  • The ocean is starting to feel cold I wonder what is happening
  • Glaciation developed here, the sea level dropped, and the world became colder. This led to the extinction of many species
  • Oh no a ice age! I am probably going to die just like my brothers, sisters, jawed fish, and heavily armored placoderms!
  • Don't bother mentioning the entire 85% of sea life that will perish too...
  • Most of the sea life went extinct
  • Mean while the plants on land were doing great
  • wow only those organisms survied?
  • Organisms that survived include trilobites, brachiopods, corals, crinoids and graptolites
  • That's what happened in the Ordovician Silurian Extinction.
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