posted on Sep, 4 2015 @ 07:54 PM
1 small microbe gets into a small herd and wipes out the entire population in the area.
It's a doomsday scenario the likes of which no other species has ever seen.
And one that I Think is most likely to wipe out mankind.
The thing that will wipe us out is either going to be very, very small (like a virus) or very, very big (like an asteroid).
Given that we don't even explore our deepest oceans to see what's down there (only something like 5% of the oceans have been mapped), and only
actually keep an eye on about 1% of our sky, I'd say that either event is about as likely as the other.