"For the Apollo 11 Conspiracy to Be True, How Many People Would Need to Be Part of the Secret?"

"Just over 400,000, says Oxford University physicist and cancer biologist David Robert Grimes. Grimes, who is also a journalist, has published a new mathematical equation in the journal PLOS ONE that estimates how long a large-scale conspiracy can last before someone behind the scenes intentionally or unintentionally pulls back the curtain."

Joshua Barajas at PBS Newshour writes about the probabilities of accurate conspiracy theories.