Does your otherwise sensible friend believe "chemtrails" are part of a sinister government plot? The psychology behind believing in conspiracy theories is fascinating. Some may even have biological causes.

Read the transcript.

Check out all the Quick and Dirty Tips shows.

Subscribe to the newsletter for regular updates.

Join the conversation on Facebook and Twitter.

Links:
https://www.quickanddirtytips.com/psychology-conspiracy-theories
https://www.quickanddirtytips.com/podcasts
https://www.quickanddirtytips.com/subscribe
https://www.facebook.com/savvypsychologist
https://twitter.com/qdtsavvypsych