In 1974 Carl Sagan sent a message into space in the form of radio waves beamed into space. It was the most powerful broadcast ever deliberately beamed into space and was directed at a star cluster nearly 25,000 light years away. The message consisted of a picture depicting our planets location in our solar system, our mathematical system, a simple shape of our body, an example of our DNA double helix structure, and a crude drawing of how we broadcast the message.
Crop circles have been around much longer than most people realize. While the term Crop Circle did not exist until the 1980’s the phenomenon has existed since the 1600’s. In 1678 there was a news pamphlet called “The Mowing-Devil” that had descriptions of crop circles. Some dispute this being a true crop circle though as the description states the crop was cut rather than folded neatly like we have come to expect today.