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Apparently some humans are born with two spleens. What evolutionary pressures likely created the trait, and what future pressures could drive second spleens to become more common? (lemmy.world)

submitted 10 months ago by JoshuaSlowpoke777@lemmy.world to c/nostupidquestions@lemmy.ca

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[–] Mothra@mander.xyz 3 points 10 months ago

I doubt this is the result of pressure, it would be much more common if it were, at least in a certain region or within a certain ethnicity.

But let's roll with it and create a fictional pressure. You could have something like a disease that slowly degrades the spleen making very few people reach reproductive maturity. Let's imagine that having a second spleen means they are much more likely to reach this age, and there's how you would make the second spleen more common.

Honestly I doubt you could ever have a disease that specific but I can't come up with a better idea atm.