Volcanoes May Have Triggered the Last Unexplained Mass Extinction (opens the source in a new tab)
Vulcanism now linked to all five major mass extinctions. Fascinating.
extinction level event
Nemesis Theory Not Dead Yet (opens the source in a new tab)
Never dies, but never proven either. Interesting Speculation
Let's Figure Out What It Would Take to Kill All Life on Earth (opens the source in a new tab)
Vesta-sized asteroid, or gamma ray burst. OR CLIMATE CHANGE.
Interview with the Creators of Salvation (opens the source in a new tab)
Boing Boing interviews creators of new Salvation asteroid impact show