this post was submitted on 15 Sep 2023
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Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The most popular seem to be lighthearted, clever little truths, hidden in daily life.

Here are some examples to inspire your own showerthoughts: 1

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I mean why 5, why 5 on each limb, why not 4 or 6. Why do our feet also have 5. Whats with our body being so symmetrical.

People who know anything about evolution, now is your time to shine.

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[–] dnick@lemmy.world 1 points 1 year ago

Mostly it’s because, information wise, it’s almost nearly “free” to take a design and duplicate it…bilateral symmetry is natures version of copy/paste.

With that in mind, it’s likely that non-‘bilaterally symmetrical’ organisms relatively regularly spontaneously develop it due to random mutation. Just like we often randomly find people with extra fingers or only one set of organs, over millions of generations, bilateral symmetry will naturally just happen. The difference being, extra fingers or ‘more than two’ organs rarely offer any evolutionary advantage, especially in already complex forms.

Millions of years ago, however, very simple organisms suddenly having two brain lobes, two eyes, twice as many fins, two gills, etc….for free (informationally) and at only a relatively higher cost energy-wise could have found itself at a distinct advantage. If you can both run from predators and towards food twice as fast, and the energy cost isn’t twice as much, you’re suddenly the two legged guy at the ass kicking contest in a parade full of one legged people.