75. Aliens caused the bubonic plague:
Black Death, which devastated the population of Europe, was caused by aliens. People throughout Europe and other plague-stricken regions of the world were reporting that outbreaks of the plague were caused by foul-smelling โ€œmistsโ€ and bright lights were reported far more frequently and in many more locations than were rodent infestations. The plague years were, in fact, a period of heavy UFO activity. Reports of identical disease-inducing mists from the plague years strongly suggest that the Black Death was caused by germ warfare and that strange flying objects were also spraying chemical or biological defoliants from the air.