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.
Science fiction sometimes barely beats out science fact as technological advancements rapidly transform the world. But the changes that are anticipated aren't always the ones that arrive. Here's a look back at what the polls tell us the public has expected from scientific progress -- and how often they've been disappointed.