Other mysteries explored in the series include Mount Weather, the number stations, backmasking on records, the secrets of Scientology, the true identities of The Residents, the initiation rites of the Freemasons and of college fraternities, anti-counterfeiting devices on money and documents, and the magic of David Copperfield.
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Some of the mysteries Poundstone explores are urban legends (such as what happened to Walt Disney after his death), while others are day-to-day matters which many people may not think to contemplate, such as what barcodes mean, the Coca-Cola formula, secret air frequencies, or what makes up KFC's 11 herbs and spices recipe.
Big Finish Productions | Big Brother | Big Ten Conference | The Big Bang Theory | Big Dipper | Reel Big Fish | Big Ben | The Big Lebowski | Big Finish | Big Ten Network | Big Sur | big band | Big Day Out | Big Brother and the Holding Company | Big Bang | Big 12 Conference | List of Doctor Who audio plays by Big Finish | Big Brother (TV series) | Big East Conference (1979–2013) | Big Bird | Big Bend | Little Big Town | Official Secrets Act 1989 | Great Big Sea | Big Star | Big Daddy Kane | Big Band | The Big Valley | Big Time Rush | Big Star (band) |
William Poundstone was, perhaps, first to make them public in his 1983 book Big Secrets, where he also described the method of administering the test.