ruveyn wrote:
Not a World Ender. However a heavy coronal mass ejection could do some serious damage and death.
There is also the matter of the shifting poles. At some point solar radiation will have an easy time making it to the ground.
Time for the 2000+ sun blocker.
ruveyn
I saw a documentary about that the other day. Seems the earth's magnetic poles are becoming unstable and North / South are likely to flip over. The dangerous part is that the changeover isn't sudden but happens over hundreds or even thousands of years during which time the earth's magnetic field is very much depleted, leading to serious holes in the magnetic field which allow solar radiation (high energy particles) to reach the surface of the earth (as opposed to being diverted off to the poles where they manifest themselves as the Aurora Borealis (Northern Lights). Apparently there is a magnetic hole forming at the moment somewhere off the east coast of south America; but when such holes start to form over land they will be extremely dangerous to all living organisms (including people) there and wipe out most surface dwelling life on the exposed areas.
I dare say that some of mankind will survive such a slowly unfolding natural disaster though by building self sustaining habitations deep underground. Poor people remaining on the surface would be toast.
_________________
I've left WP indefinitely.