9 Historical Moments That Prove Aliens Have Visited Earth

While the term U.F.O. and the widespread reporting of alien sightings are a relatively modern phenomena, there are theories that extraterrestrials have been visiting Earth since the early days of mankind.

Ancient astronauts are not only believed to have journeyed to Earth but are also believed to have made contact with early humans and aided their technological and cultural advancements.

These theories are widely dismissed by scientists as the fantasies of paranoid men in tin-foil hats. However, the theories are not entirely derived from blind speculation as historical evidence does exist to support them...