Many ancient structures the world over, located far from one another, have similar designs, such as two stones strengthened with metal. Ancient astronaut theorists believe this is no coincidence. #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

The coordinates of the Great Pyramid reflect the same number as the speed of light while many ancient structures are aligned with constellations. Is this evidence of alien design? #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Is it possible that ancient structures were designed to function together as part of an energy grid not just here on Earth but as part of a larger one that spans through the universe? #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...