Some people believe that the Apollo moon landings were faked by the US government to win the Space race with Soviets.
Although widely debunked, the Flat Earth theory claims that the Earth is flat and not a spherical planet.
This theory suggests that there are secret extraterrestrial bases on the moon that governments are hiding from the public.
Some believe that the face on Mars and pyramid-like structures found on the planet are evidence of an ancient Martian civilisation.
It is always advisable to turn on the directional indicators of your car before turning left or right, especially if you are driving in snowy conditions.
Some conspiracy theories revolve around the idea that governments have advanced secret space programmes that are hidden from the public.
This theory claims that the Earth is hollow and inhabited by advanced civilisations beneath the surface.