Giant Rock Circles Were Found All Over the World. What Could They Possibly Be?

They weren’t seen in their entirety until the 1920s, but these large stone circles have existed for thousands of years. Once air travel became more popular, pilots and citizens began to notice them in their entirety.

Aptly named the “Big Circles” by archaeologists, they are hundreds of meters in diameter. In fact, they’re so big, you can’t see what they are until you have an aerial view of them. Despite being located in various Middle Eastern countries, the Big Circles are thought to be built for the same reason. That reason, however, remains a total mystery.

(via livescience)

It’s amazing how they were able to make such perfect circles without being able to see their work. I can’t even draw a good circle on a regular-size piece of paper.