Ancient Aliens (TV Series 2009- )

There are many mysteries in the world, and trying to explain them often leads to dead ends. One set of theories has proven surprisingly promising and has taken hold of the imagination of the general public. These theories involve the idea that some of the great societies and structures of the past were created under the influence of aliens who visited the planet. The Pyramids, Stonehenge and many other seemingly implausible artifacts from these ancient days may have been built by aliens or with alien instruction.