About: Purple Earth hypothesis

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Astrobiological hypothesis that life forms of early Earth were retinal-based rather than chlorophyll-based, making Earth appear purple rather than green

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  • astrobiological hypothesis that life forms of early Earth were retinal-based rather than chlorophyll-based, making Earth appear purple rather than green (en)
  • hipótesis astrobiológica (es)
  • théorie exobiologique (fr)
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  • Purple Earth hypothesis (en)
  • Hipótesis de la Tierra púrpura (es)
  • Hypothèse de la Terre pourpre (fr)
  • Ipotesi della Terra viola (it)
  • Гипотеза пурпурной Земли (ru)
  • Гіпотеза фіолетової Землі (uk)
  • 紫色地球假說 (zh)
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