"Reptilian Phenomena" refers to a conspiracy theory suggesting that shape-shifting reptilian aliens, often called Reptilians, secretly control Earth. Proponents believe these beings are capable of disguising themselves as humans and infiltrating positions of power, such as governments and corporations. This theory gained popularity in the late 20th century, particularly through the works of authors like David Icke. Supporters of the theory argue that Reptilians manipulate global events to maintain control over humanity. They often cite historical figures and events as evidence of this hidden influence. However, there is no scientific evidence to support the existence of Reptilians or their alleged activities.