Earth Signs

Earth Signs are really similar to crop circles, in fact, earth signs do include crop circles but in this context we focus on earth signs which are of a more permanent nature, large works of earth art which can only be viewed at altitude, even from space, which were created prior to our ability to fly.  Whether these earth excavations are the product of Alien Ancestors or merely people with a desire to advertise their presence to potential travelers or passing deities.

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