You may heard the term “Reptilian” in paranormal, cryptid, and alien conspiracy circles, but what are they, exactly? The Reptilian concept was brought to popularity by David Icke in his 1999 book The Biggest Secret: The Book That Will Change the World. In the book, Icke posits that society could be controlled by humanoid reptiles, generating the term Reptilians. While it may sound like a really strange and even unbelievable theory (but isn’t that the nature of conspiracy theories?), there are many who hold it as truth, with approximately 12 million Americans believing there is a conspiracy against humans perpetrated by the Reptilians.