Finland is a geographical illusion: Created following the Trans-Siberian Treaty. Theorists claim the country was invented so Japan could fish undisturbed in the Baltic Sea without facing international criticism.
Mark Zuckerberg is cold-blooded: Or rather, an extraterrestrial reptilian attempting to dominate the world from a metaverse. "Glitches" in his public broadcasts or his love for water are cited as definitive proof.
Birds aren't real: A satire originating in the United States claiming that all birds were replaced by government spy drones during the 1950s to monitor citizens.
The Paul McCartney "clone": The famous "Paul is Dead" theory, born in the 1960s. It claims the real Beatle died in a car accident and was replaced by an identical lookalike (William Campbell), whose hidden messages can be heard when playing vinyl records backward.