Also look to see whether those spreading the conspiracy theories have something to gain. For example, scholarly research has identified the 12 people who are the primary sources of false claims about vaccinations. The researchers also found that those people profit from making those claims.

Conspiracy theories span a wide variety of topics, people, events, and even companies. But what happens when a conspiracy theory becomes a conspiracy fact? Check out this list of what were once considered outlandish and ridiculous conspiracy theories that ended up being true,