This topic is a very interesting one. To be quite honest I really don't think ANYTHING manmade could make our species extinct. Let's think about this for a moment:
1) Nuclear War
Ok fair enough, this would probably wipe out most of us; but the beauty of natural selection is that there will be some people out there more resistant to radiation than others... or maybe some of us will be in a fallout shelter, or perhaps an area that isn't heavily bombed (i.e. austrailia
).
2) Disease
I seriously doubt this would wipe us ALL out. Even if they managed to genetically engineer the ultimate virus which no immune system could resist, they'd still have to distribute it to the entire population. SOMEONE would survive it (even if they were astranauts on a satalite in space
)
I think the only way the human race could truly be made extinct, is if there was some kind of cataclysmic event; the likes of which we've never come up against (e.g. the Sun exploding, Gigantic meteorite etc..)
Otherwise, i'd say as a species; we're in quite a comfortable position
Of course, we'd have to avoid the Crab People or old people leaving their irons on.
1) Nuclear War
Ok fair enough, this would probably wipe out most of us; but the beauty of natural selection is that there will be some people out there more resistant to radiation than others... or maybe some of us will be in a fallout shelter, or perhaps an area that isn't heavily bombed (i.e. austrailia

2) Disease
I seriously doubt this would wipe us ALL out. Even if they managed to genetically engineer the ultimate virus which no immune system could resist, they'd still have to distribute it to the entire population. SOMEONE would survive it (even if they were astranauts on a satalite in space

I think the only way the human race could truly be made extinct, is if there was some kind of cataclysmic event; the likes of which we've never come up against (e.g. the Sun exploding, Gigantic meteorite etc..)
Otherwise, i'd say as a species; we're in quite a comfortable position

Of course, we'd have to avoid the Crab People or old people leaving their irons on.