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Wait! Before you step outside... is it Friday the 13th? Any black cats prowling around? Broken a mirror lately? Homo sapiens are a superstitious lot. Find out why our brains are wired for irrational belief. Plus, from the 2012-end-of-the-world prophesy to colliding planets - why some people believe the universe is out to get \u2018em.\nAlso, Brains on Vacation takes on a challenge to relativity and our Hollywood skeptic has doubts about exorcism. It\u2019s enough to make your head spin on Skeptic Check\u2026 but don\u2019t take our word for it!\nGuests:\n\n\nBruce Hood - Cognitive scientist at the University of Bristol in the U.K. and author of The Science of Superstition: How the Developing Brain Creates Supernatural Beliefs\n\n\n\nDavid Morrison - Director of the Carl Sagan Center for The Study of Life in The Universe at the SETI Institute and keeper of the NASA website Ask an Astrobiologist\n\n\n\nMartin Snow - Research Scientist, Laboratory for Atmospheric and Space Physics at the University of Colorado at Boulder\n\n\nJim Underdown - Executive Director, Center for Inquiry, West - Los Angeles\n\n\nPhil Plait - Astronomer, keeper of badastronomy.com, and author of Death from the Skies!: These Are the Ways the World Will End . . .\n\n\nDescripci\xf3n en espa\xf1ol\nFirst aired August 16, 2010\nLearn more about your ad choices. Visit megaphone.fm/adchoices