Artifacts such as pottery shards and hearth materials have been dredged up from the bottom.The scale of the city is quite large, especially considering the fact that one piece of wood has been dated from as early as 9500 BC.
Others believe that they were actually used as primitive seismic instruments, with the balanced stones acting as earthquake detectors.
The Carnac site is also thought to support the controversial idea of the “megalithic yard”, a theoretical common unit of measurement that was used to build most megalithic sites.
All of them are ancient—and they hint at the strong possibility that we don’t know anywhere near as much about our distant past as we think we do. There is a variety of theories as to the purpose of the stones.
The Carnac stones are a dense collection of more than three thousand standing stones around the French village of Carnac—the largest such collection in the world. Some claim that the stones are aligned astronomically, with the intention of creating an observatory or a calendar system.
All that being said, we still don’t know how or why the temples were built.
Ranging in size from a few centimeters to more than two meters in diameter, and weighing fifteen tons, a collection of over two hundred stone spheres has been found in Costa Rica.
Although the stones have been weathered, damaged, and eroded over the centuries, some believe they were originally carved into perfect spheres.
Once again, we still don’t know what purpose was served by these stones. Each head is carved with a unique headdress, leading some to believe that they were meant to be representations of powerful Olmec rulers.
On Easter Island—one of the most remote inhabited islands on Earth—lies one of the world’s most famous mysteries.