• merc@sh.itjust.works
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        2 months ago

        I mean, humans run around on something that birds would consider knees, and stupidly try to support their entire body weight using only half their legs.

    • merc@sh.itjust.works
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      2 months ago

      Humans have multiple toes because our ape ancestors used their toes like fingers. Having multiple, separate toes is probably bad for survival unless you’re using toes to manipulate tools.

      Animals that have distinct toes include apes, geckos, mice, raccoons and similar animals which need them to grip onto surfaces or to manipulate things. There are predators which have separate toes because they’re a place to mount claws: eagles, cats, etc. There are animals that have separate toes with webbing between for swimming. But, for a lot of animals, separate toes aren’t really useful, so they’ve evolved away: elephants, rhinos, giraffes, horses, cows, etc.

      • Seleni@lemmy.world
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        2 months ago

        Yeah, but at least most of those still have multiple toes to spread the weight around. Horses decided to get rid of that completely.

        • merc@sh.itjust.works
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          2 months ago

          Spreading the weight around using toes doesn’t seem to be a useful strategy. It’s also not something that humans do. Human toes are not at the weight-bearing part of the foot. And, while I’m sure toes are somewhat involved in agility, having individual toes doesn’t seem to be. In fact, if you look at apes like gorillas and chimps, it’s pretty clear that our toes have been getting shorter and less important as we’ve been evolving as upright-walking creatures who don’t live in trees. Instead, the sole of the foot, which used to be much more like the palm of a hand, has been getting longer and sturdier.

          If you have separate toes, you have multiple fragile things that can break or be torn off. If you have one mega-toe it’s going to be sturdy. That’s probably why the heaviest animals have the fewest / smallest toes.