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Crop circle season arrives with a mathematical message | The Independent | The Independent
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Crop Circle: Prank, Alien Contact, or X-Files Alternate Reality Game? | WIRED
Easy as pi: Astrophysicist solves riddle of Britain's most complex crop circle | Daily Mail Online
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The crop circle evolves | Nature
Crop circle - Wikipedia
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Is it a UFO generated crop circle or the outline for the tank
![Best Buy: Mayan Prophecies and Crop Circles/The Mystery of the Crop Circles [1993]](https://pisces.bbystatic.com/image2/BestBuy_US/images/products/1877/18773639_sd.jpg "Best Buy: Mayan Prophecies and Crop Circles/The Mystery of the Crop Circles [1993]")
Best Buy: Mayan Prophecies and Crop Circles/The Mystery of the Crop Circles [1993]
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Mathematics Awareness Month - April 2014 - Geometry of Crop Circles
My5 - Ancient Aliens - Season 8 - Episode 8 / Circles From The Sky
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Pi appears in crop circle | plus.maths.org
Wiltshire crop circle identified as symbolic code for first ten places of pi - ppt download
England's crop circle controversy - BBC Travel
