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Cake day: February 1st, 2024

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  • Your answer doesn’t make sense.

    “Photosynthesis” is a positive development for life. The great filter must be a negative development: it’s a filter or a barrier that keeps life from achieving long term extra terrestrial survival.

    So “climate change” would be an answer. Or “fuel depletion” (to which photosynthesis may be a solution). But the filter is the mechanism by which life forms are prevented from progressing.