Why do so many children’s textbooks across the world disagree about fundamental details of the past? Who controls the narrative of history? Tune in to learn more about historical revision: why it's a crucial force for good, and how it can misused.

Conspiracy theories about hidden knowledge of extraterrestrials have been around for decades, but one of these theories has an interesting twist: What if the world's governments are using pop culture to prepare humanity for the arrival of aliens?

Imagine if a government disguised its operatives as members of some other organization -- and then attacked itself. While this might sound crazy, several historians have argued that false flag attacks are more than just conspiracy theories.

At first glance, agent provocateurs sound like something out of Orwell's 1984. Why would someone infiltrate a peaceful protest and purposefully try to make it escalate into violence? Tune in to learn more in our series on dirty tricks.

Since 9/11 the F.B.I. has prevented several terrorist attacks, but some critics believe there's more to the story. Tune in to learn more about the line between sting operations and entrapment -- and why some believe the F.B.I. is crossing it.

The DEA considers marijuana a Schedule I Controlled Substance, meaning it's as harmful as heroin or ecstasy. But how did it become illegal in the first place? Tune in to learn more about marijuana and conspiracy theories.

This food additive is banned in numerous countries, but remains legal in the United States. Tune in to learn more about food additives -- and why some conspiracy theorists believe harmful chemicals in food may be part of a much bigger plan.

When Dr. Martin Luther King, Jr. was murdered at a Memphis motel, the world recoiled in shock. Two months later James Earl Ray was arrested and, ultimately, convicted of the crime. So why do some people think there's a cover-up? Tune in and learn more.

International banking companies and institutions are often accused of participating in conspiracies -- but why? Tune in to learn more about international banking and conspiracy theories.

International banking companies and institutions are often accused of participating in conspiracies -- but why? Tune in to learn more about international banking and conspiracy theories.