this post was submitted on 04 Nov 2024
52 points (96.4% liked)

No Stupid Questions

35706 readers
2427 users here now

No such thing. Ask away!

!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules (interactive)


Rule 1- All posts must be legitimate questions. All post titles must include a question.

All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.



Rule 2- Your question subject cannot be illegal or NSFW material.

Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.



Rule 3- Do not seek mental, medical and professional help here.

Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.



Rule 4- No self promotion or upvote-farming of any kind.

That's it.



Rule 5- No baiting or sealioning or promoting an agenda.

Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.



Rule 6- Regarding META posts and joke questions.

Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.

On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.

If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.



Rule 7- You can't intentionally annoy, mock, or harass other members.

If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.

Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.



Rule 8- All comments should try to stay relevant to their parent content.



Rule 9- Reposts from other platforms are not allowed.

Let everyone have their own content.



Rule 10- Majority of bots aren't allowed to participate here.



Credits

Our breathtaking icon was bestowed upon us by @Cevilia!

The greatest banner of all time: by @TheOneWithTheHair!

founded 1 year ago
MODERATORS
 

I realised that for some reason, I still don't know this. Why do we have different skin colors, hair textures, eyes or such? Is it just a random thing that happened or are there evolutionary reasons to it?

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 66 points 3 days ago

Some are random and have no disadvantage, so they stick around. Others have an advantage that may or may not still be relevant.

High melanin levels help with bright equatorial sun. Low melanin levels help with vitamin D synthesis in areas where there's less sun.

Curly African hair is better at protecting the scalp from the sun and heat. There's less hair follicles overall, allowing for better airflow and the tight curls keep the hair away from the scalp allowing it to cool better. This also meant less sweating, which made it easier to remain hydrated and clean.
Straighter hair tends to be more dense, and to do a better job keeping you warm.

A lot of the other traits are random, or in genes connected to the general melanin genes, since evolution is unlikely to specifically target just the melanin levels of skin, and not the overall melanin level.

Some traits are also a result of sexual selection. Peacocks have large, vibrant plumage because it helps them attract a mate. Some human characteristics are the same. We essentially selectively bred ourselves based on the whim of aesthetics.

Finally, much of what we consider racial differences between people are social constructs.
That's not to say that the differences aren't real, but that the racial division is a relatively arbitrary line.
For example, I'm nearly a foot taller than my wife. My ancestors wandered up from Africa, landed in Scandinavia and then drifted to Scotland and southern England before coming to the Americas and getting mixed up in the Canadian fur trade in the 1600s. My wife's ancestors stopped in Germany before coming to the Americas in the late 1800s.
Our children are not considered mixed race because our skin is the same color, even though the actual lineage is pretty distinct.

We decided that skin color is a race marker, but not things like "height", "toe and finger length", or things like that.
Except for where we did, like when European colonizers relatively arbitrarily decided that different traits were racial markers amongst the colonized, like nose shape and chin thickness.

All that to say, much of what we consider obvious racial differences that stand out are only such because we decided to pay attention to them. Other perfectly visible variations are just normal individual variations.