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Purple Earth hypothesis : ウィキペディア英語版 | Purple Earth hypothesis Purple Earth hypothesis is an astrobiological hypothesis that life forms of early Earth were retinal-based rather than chlorophyll-based thus making Earth appear purple rather than green. An example of a retinal-based organism today is the photosynthetic microbes called halobacteria.〔(LiveScience.com: Early Earth Was Purple, Study Suggests ) Accessed May 9, 2007〕 ==See also==
* Red edge
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Purple Earth hypothesis」の詳細全文を読む
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