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Key Facts In This Video
Crop circles first made national news in the United Kingdom during the late 1970s and '80s. 00:26
Cereologists accept that many crop circles have been made as hoaxes, but argue that some are too old or complex to have been created this way. 01:34
The Gaia hypothesis is the idea that the Earth is a living, possibly conscious super-organism. 03:00
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