>When have we not been on the verge of a “mass species extinction” event on our blue dot? Try 90+% of Earth's history? https://en.wikipedia.org/wiki/Extinctio

>When have we not been on the verge of a “mass species extinction” event on our blue dot? Try 90+% of Earth's history? https://en.wikipedia.org/wiki/Extinction_event https://en.wikipedia.org/wiki/Extinction_event Though all living humans are alive during the current (anthropocene) extinction event, so in that sense "we" have never known anything else.