Mass Extinction Threat: Earth on Verge of Huge Reset Button?

[Paris]

http://www.livescience.com/animals/mass-extinctions-threat-earth-animal-diversity-100902.html

[Paris]

The ancients used natural underground bunkers...caves. There's a line in the Kolbrin about man emerging from underground when it was all over. I think I would trust a natural bunker over a man made one any day.

[RLP]

Thats interesting. But I wonder how the extinct level operates for the human species that builds underground bunkers and hides out while the rest of life deals with the actual crisis. They conveniently forgot to mention that, didn't they?