Lots More Information

• How Nuclear Bombs Work
• How Global Warming Works

• BBC News: Climate resets 'Doomsday Clock' - Jan. 17, 2007
• The Bulletin of Atomic Scientists
• The Washington Post: Two Minutes Closer to Doomsday - Jan. 18, 2007

Sources

• Bentley, Molly. "Climate resets 'Doomsday Clock'." BBC News. Jan. 17, 2007.
  http://news.bbc.co.uk/2/hi/science/nature/6270871.stm
• The Bulletin of Atomic Scientists
  http://www.thebulletin.org
• Williamson, Elizabeth. "Two Minutes Closer to Doomsday." The Washington Post. Jan. 18, 2007.
  http://www.washingtonpost.com/wp-dyn/content/article/2007/01/17/ AR2007011701783.html