20 Threats to All of Humankind ...
(Top Posts - Science - 091700)

... I don't find the following very comforting but hey,
what's a human being to do, when faced with the
reality of a world in which humans are but a tiny
part of a much larger play?

(link no longer available)
http://www.discover.com/oct_00/featworld.html

1. Asteroid impact
2. Gamma-ray burst
3. Collapse of the vacuum
4. Rogue black holes
5. Giant solar flares
6. Reversal of earth's magnetic field
7. Flood-basalt volcanism
8. Global epidemics
9. Global warming
10. Ecosystem collapse
11. Biotech disaster
12. Particle accelerator mishap
13. Nanotechnology disaster
14. Environmental toxins
15. Global war
16. Robots take over
17. Mass insanity
18. Alien invasion
19. Divine intervention
20. Someone wakes up and realizes it was all a dream