Tabloid headlines, internet comment threads, that one uncle at Thanksgiving dinner: Conspiracy theories are everywhere. Polls reveal the truth -- the truth about what the public believes, that is. While some conspiracy theories are dismissed by the vast majority of the public, others are widely accepted as true.
This week NASA announced that its analysis of rock dust suggests there could have been life on Mars. We're talking microbes. They can't come right out and spill the beans about alien life because there's that incident in Roswell, New Mexico, back in 1947 that's had the government tongue-tied ever since.