Roswell crash and its cover-up.
Something crashed on a remote ranch outside of Roswell, New Mexico in 1947. The government claimed it was a weather balloon, but many believe it was a UFO.
Princess Diana was killed by the monarchy.
There are different theories on this matter. Many believe the Queen wanted Diana dead for various reasons, and many others think it might have been Charles.
Paul McCartney is dead.
McCartney got into an argument with the other Beatles, stormed out of the studio, and got run over. They hired a look-alike to keep The Beatles alive.
Health authorities are hiding natural cures.
A 2014 research letter published in JAMA Internal Medicine found that 37% of Americans believe that the FDA is suppressing natural cures for cancer.
CHEMTRAILS
The "Chemtrails" conspiracy theory holds that condensation trails are full of other chemicals that scientists and governments are seeding into the atmosphere.
9/11 was an inside job.
Although having no clear evidence, many people believe 9/11 was actually done by the U.S. to steal resources from the Middle East.