1) About half of American adults believe in at least one conspiracy theory, such as theories related to 9/11, Obama's birthplace, cancer cures, or the recession. 2) Conspiracy theorists tend to be less trusting, engage in magical thinking, and see meaning where others do not due to traits like schizotypy. They are drawn to alternative explanations because they have a need to understand events and patterns. 3) The internet has enabled online communities for conspiracy theorists on platforms like YouTube and Facebook that welcome conspiratorial thinking and appeal to lonely individuals seeking belonging.