From UFOs to psychic powers and government conspiracies, history is riddled with unexplained events. You can turn back now or learn the Stuff They Don't Want You To Know, an audio podcast from HowStuffWorks.com.

Project Horizon: The Secret US Moon Base

July 19, 201955 min
There have always been conspiracy theories about secret structures on the lunar surface, and in modern decades numerous fringe researchers have alleged that various governments have already built some sort of permanent structure on the moon. It sounds pretty out there, but could there be a grain of truth to the stories? Tune in to learn more about Project Horizon. Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers