How do you think the world will end? Where a large majority if not all of humanity and other life on earth is wiped out. Will it be a nuclear bomb? Will it be a disease or biological experiment gone wrong? Will it be global warming or something? What do you think? Personally I'd bet the Japanese sex robots will kill us all, thanks to a rouge programmer *cough* warr *cough*
Probably happen during the next polar shift, when the protection of the earth's magnetic field is weakest. Then the solar radiation will burn away much of the worlds upper atmosphere.