Two Billion Years Ago, up to 99 Percent of Life on Earth Died - Newsweek

Scientists have discovered a mass die-off that took place two billion years ago—with up to 99.5 percent of life on Earth disappearing. The massive die-off saw more of the planet's biosphere vanish than when the dinosaurs were wiped off the face of the planet 65 million years ago, researchers say. ....
https://www.newsweek.com/earth-massive-die-off-dinosaur-extinction-1457228