Whitley Streiber has posted an exploration of what the jellyfish crop circle might mean:

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A number of incredible crop circles have appeared this year, including one that represents a jellyfish, at a time when strange jellyfish-shaped lightning appeared over France, and the world jellyfish population is exploding, crowding out edible ocean fish. Is all this a warning for us?
Massive swarms of jellyfish are transforming many fisheries and tourist destinations into "jellytoriums" that cover hundreds of square miles, endangering the world's food supply. Areas in the US that are hit by this include Hawaii, the Gulf of Mexico, and the East Coast. These jellyfish range in size from tiny, peanut-sized to huge jellies (the size of refrigerators) in Japan. The Portuguese Man-of-War, depicted in the crop circle, has tentacles which can grow to be 30 feet long. The causes include pollution, climate change, introductions of non-native species, overfishing and the presence of offshore drilling rigs.
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Read more at:
http://www.unknowncountry.com/news/?id=7651 On another topic:
Also, Linda Moulton Howe has posted a pic of a beautiful new crop circle in the shape of yin and yang:
http://www.earthfiles.com /
You might have to scroll just a little for this pic.

Cher