"The great dying" "The most catastrophic event in earth history" "When every living thing was about to get wiped out" "the massive exctinction"
>"But what exactly happenned?"
"Uhh ohh I dunno"

This is literally the only answer I get to have when I try to find out more about this event. Could someone tell me what EXACTLY happenned and why it happenned? I want concise details