Can earth servive for more than 100 years?
Earth – possibly Humanity – less likely Civilization – unlikely There are more and more threats to civilization emerging every day. In the 19th century the biggest threat to humanity (other than threats which were always there, like meteors and earthquakes) was a disease like a virulent flu, or smallpox, and even that would have only killed (at the most) a few million people. Now we have global warming, weapons of mass desturction and soon we might have geneticly enginered viruses or nanites capable of killing billions, as well as the possibility of a devastating natural illness, some of which could destroy the world, quite a few of which could just wipe out humanity and take quite a bit of life with them, and all of which could potentially wipe out civilization. One possibility that we have never been visited by aliens is that whenever a civilization gets as advanced as us it self destructs.
