• azi@mander.xyz
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    2 days ago

    Organisms need some oxidizing agent to respire. We use oxygen because it’s very highly reactive and thanks to photosynthesis is goddamn everywhere.

    • Paradachshund@lemmy.today
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      2 days ago

      Can you explain that first part in more detail? I really know nothing about this and I’m curious to hear more.

      • Tlaloc_Temporal@lemmy.ca
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        2 days ago

        Fire gets it’s energy from fuel+oxygen. Most life does too. Plants (and other photosynthetic organisms) can also get energy from light but that requires you to sit in the sun doing not much for a long time. There’s also chemosynthesis, where energy is obtained from a chemical reaction, but that’s usually not nearly as powerful as oxidation.

        Put another way, a car with NOS is way faster and more powerful than one without. So too is life that uses oxygen more powerful than life that doesn’t.

        • Paradachshund@lemmy.today
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          2 days ago

          That’s really interesting. I didn’t realize the burning in slow motion thing was so literal. Thanks for the comment!

          • chatokun@lemmy.dbzer0.com
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            1 day ago

            It’s so ingrained in our life processes. You know Calories? The capital C version(or Kcal in some countries) is 1000 calories. What do they measure? The potential heat whatever is being measured can generate. Our fuel intake is measured by how well it burns.