https://www.geosociety.org/GSA/Education_Careers/Geologic_Time_Scale/GSA/timescale/home.aspx
- 1 billion years ago Ancestors of modern plants, fungi, and animals split into separate lineages.
- 890 million years ago Fossils indicate the presence of sponges.
- 440 million years ago 86% of species, including graptolites, are lost in the End Ordovician extinction.
- 375 million years ago 75% of species, including most trilobites, are lost in the Late Devonian extinction.
- 251 million years ago 96% of species, including tabulate corals, most trees, and synapsids, are lost in the End Permian extinction, also known as "The Great Dying".
- 200 million years ago 80% of species, including all conodonts, are lost in the End Triassic extinction.
- 66 million years ago 76% of species, including all ammonites, mosasaurs, plesiosaurs, pterosaurs, and nonavian dinosaurs, are lost in the End Cretaceous extinction.
