7 Unsolvable Mysteries (That We Can Totally Solve)
3. Pyramids Appear All Over The World And Predate Contact
Pyramids have always commanded awe and respect from us and these ancient monuments are found all over the world.
In fact, pyramids crop up on totally separate continents and generally predate any contact between those cultures that built them, so what gives? Were they really mandated by an all powerful god to these disparate peoples? Perhaps they were put there by aliens. It always comes down to aliens in the end.
One of the central tenets of science is that the simplest answer is probably the correct one (even if it didn't feel that way in physics class) and, rather than imagining a great alien race installing global charging stations, or mystical ley lines connecting each pyramid, we should consider the idea that a pyramid is a really excellent way to pile up rocks so that they don't fall down for many thousands of years. They also strongly resemble mountains, which also appear all over the world and were often regarded as spiritual places or even gods themselves by ancient cultures.
A great many other structures from ancient times have crumbled and decayed, but pyramids are stable structures and weathered the storm.