CougTek
Hairy Aussie
The least of our problems. Magnetic field's strenght has already started to decrease significantly (more than 10% in the last century). When it will become unstable, it will be more of an inconvenience than a life-threatening event.Sudden shift of magnetic poles,...
I read that one should hit Earth in approximately 7000 years. I hope our solar system will move enough on a galactic scalle to avoid it by then....gamma-ray burst from undetected celestial object,...
That one will probably happen, but no one knows when. What we know is that the magma chamber is completly full and it's due to blow any time, according to its hstorical timescale.Yellowstone's epochal mega-eruption,...
We should detect potential asteroid/comet threats before they hit Earth from now on.Tunguska-like event, ...
Of all the above, I believe Yellowstone's supervolcano is the most serious reason to worry, mainly because it's more of a when than an if.