# Stephen Petranek counts down to Armageddon

How might the world end? Stephen Petranek lays out the challenges that face us in the drive to preserve the human race. Will we be wiped out by an asteroid? Eco-collapse? How about a particle collider gone wild?

- Kind: Talk
- Year: 2007
- Runtime: 29 min
- By: TED.com
- Genres: Education, Science, Space
- Archive: [Internet Archive](https://archive.org/details/StevenPetranek_2002)
- Licence or status: [CC BY-NC-ND 3.0](http://creativecommons.org/licenses/by-nc-nd/3.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/StevenPetranek_2002?play=1)