Could some conspiracies exist? Physicists decided to test whether some science-related conspiracies alleged to exist were actually tenable. What did they find? These conspiracies would have been discovered in less than four years.

While most of us can keep a secret, large groups of people sharing in a conspiracy will quickly give themselves away.

"A number of conspiracy theories revolve around science," said David Robert Grimes, one of the researchers, in a news release. "While believing the moon landings were faked may not be harmful, believing misinformation about vaccines can be fatal. However, not every belief in a conspiracy is necessarily wrong-for example, the Snowden revelations confirmed some theories about the activities of the U.S. National Security Agency."

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