These crop circles would indicate their presence and intentions. One example of alien-made crop circles is the Chilbolton crop circle that appeared in 2001 in Hampshire, England. However ...

Modern-day crop circles first appeared in the English countryside in the 1970s, with their intricacy and number steadily increasing over the years. Were they made by aliens, time travellers ...

An curved arrow pointing right. Ever notice those funky circles scattered about the landscape while flying over the central U.S.? Some call them crop circles, but it turns out they're something ...