Today I Learned (TIL)

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You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

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TIL the Purple Earth Hypothesis proposes that the Earth's surface biosphere may have appeared purple in the past due to photosynthesis at the time being based on simpler retinal instead of more co... (en.wikipedia.org)

submitted 1 month ago by bOt@zerobytes.monster to c/todayilearned@zerobytes.monster

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The original post: /r/todayilearned by /u/woeful_haichi on 2025-02-04 14:42:32.

Original Title: TIL the Purple Earth Hypothesis proposes that the Earth's surface biosphere may have appeared purple in the past due to photosynthesis at the time being based on simpler retinal instead of more complex chlorophyll

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