2 ms·The vast majority of all extinctions on the planet occurred before humans had anything to do with it.by ams6110 9y agoThe vast majority of all extinctions on the planet occurred before humans had anything to do with it.Avshalom 9y agoThat doesn't change the number of interesting chemicals we've missed from our own incuriosity/destruction.adrianN 9y agoHumans are responsible for the current mass extinction event though.