When were crop circles first discovered?
There is claimed to be a photograph of a circle from the 1930s in an archived book about Sussex, England. The earliest readily available photograph of a clear circle is from Australia in 1966, although it is in reeds on top of a pond, which differentiates it from the usual phenomenon. The earliest image clearly showing a swirled crop circle on land is from 1976, and was photographed in Switzerland.
