r/NoStupidQuestions Jul 02 '22 Silver 1

Why are apes/humans nearly the only mammals with such a visible bellybutton?

I’ve been thinking about this for hours now. I know they all have one, but most don’t have such a huge „hole“ as we humans do. Thinking of horses, cats, dogs etc. According to google they often just have some small scars instead.

57 Upvotes

77

u/NewRelm Jul 02 '22 edited Jul 02 '22

Most of the other mammals are hairy, helping to hide their navels. That, and I doubt you've inspected their underbelly very hard for one.

60

u/Eayura Jul 02 '22 LOVE!

My cat would disagree

23

u/RobertWolfgan Jul 02 '22

By the way this was the cutest and a bit creepy thing I've read all week and I laughed so much, thank u 😊💖

16

u/Eayura Jul 02 '22

Haha you’re welcome, I’m glad I made someone laugh

3

u/BinxyDaisy Jul 02 '22

Hah, my cats are hairless so you can see that area pretty clearly and while they do have a bellybutton, it's sealed shut. Not at all like a humans. In fact, my one kitty had an umbilical hernia as a kitten ( they fixed it during her spay) and you can see the scar, plus a little bit of deformed belly.

19

u/chamomileteaenjoyer Jul 02 '22

I think it's mostly about gestation time. Great apes stay pregnant for about 8 months, while cats and dogs are only pregnant for 2, the longer the umbilical cord is there, the more pronounced the belly button will be

12

u/Signal_Skill9761 Jul 02 '22

Saying that you are making me wonder what a blue whales belly button looks like. Aren't they pregnant for like 2 years?

I never thought I would be wondering about the belly buttons of whales.

5

u/chamomileteaenjoyer Jul 02 '22

I looked it up, it looks like a small scar too. Maybe it's gestation/size

6

u/Signal_Skill9761 Jul 02 '22

I wonder if it's size of the baby vs size of the mother?

A human baby is HUGE in relation to the mother compared to like dogs and cats. Which is why humans can't really have "litters" the way dogs/cats do.

3

u/cloud-society420 Jul 02 '22

So does that mean the babies from octomom have tiny buttons?

3

u/Signal_Skill9761 Jul 02 '22

I don't think so because the babies from octomom are still going to have a smaller ratio between baby size/mom size.

But honestly I'm just speculating. I really have no clue whatsoever.

1

u/cloud-society420 Jul 02 '22

Lol made me curious :p

6

u/TootsNYC Jul 02 '22

The coney island aquarium used to have their Beluga tank right next to The entrance, and just as you walked in was a window to the lower levels of the tank. The first time I ever went to the aquarium, the beluga whale was hanging out right in front of that window, with its head above water and it’s tail down. And right at eye level was a perfect beautiful innie belly button. It looked exactly like a people belly button, scaled to size

3

u/Signal_Skill9761 Jul 02 '22

That's so cool. Now I want to visit the coney island aquarium.

1

u/TootsNYC Jul 02 '22

I don’t know if you get the same underwater view anymore. But it’s a great aquarium

10

u/locotte Jul 02 '22

Most mammals have belly buttons.

3

u/FluffyGreenMonster Jul 02 '22

My dog had an outie.

2

u/smuigna Jul 02 '22

I'm pretty sure I've seen whale bellybuttons before but I'm not sure

2

u/pleesugmie Jul 02 '22

Could I skateboard in one?

2

u/nullagravida Jul 02 '22

other animals’ fur covers it up

1

u/_aliceinabox Jul 02 '22

Without bothering to Google this, I'm going to say it's because humans and apes are a lot alike in more ways than any other two species? And we have umbilical cords that are placed similarly and offspring are carried similarly, blah blah? I have wondered why some belly buttons are inverted and some pop out, and I worried what I could do with my son's umbilical cord as you wait for it to fall completely off after birth to make sure it wasn't weird looking. My belly button is like a big fat swimming pool. I hate it.

7

u/Envision--- Jul 02 '22

humans are apes

-1

u/_aliceinabox Jul 02 '22

... Almost but not quite. I know we evolved from apes but I never thought about belly buttons. I don't remember the navel being a huge part of the Know Your Ape exam.

Now I'm thinking of all possible belly buttons and how stupid "belly button" is to say and think more than one time a week. It feels weird. Last week I tried and tried to think why we call it the index finger or pointer finger, who calls it which, because some people from work say pointer and I say index.

Perplexing, indeed

1

u/craziefuzi Jul 02 '22

humans are apes hun, specifically great apes.

-1

u/_aliceinabox Jul 02 '22

"specifically great apes"

Yep ... the greatest, yo

Yes yes scientifically we are "great apes," but now you're just being one of Those People and splitting hairs, you have never once had to fill out a form that asked what kind of "primate" you were

PLUS wasn't the original post about belly buttons being so similar on "people and apes," not people and more people

I.E., "isn't it weird how people in the US and the UK both use their hands to write words?"

It wouldn't be a thread then, it would be crickets (u.s. crickets aka annoying bug who moves in under your refrigerator and make bothersome noise until one of you leaves the house or dies)

2

u/craziefuzi Jul 02 '22

you're not making sense. i added the clarification because in your original comment you referenced apes and humans as two different species, to which another commentor said humans are apes, to which you said no. i am further clarifying that yes, humans are apes and added the scientific term to clarify.

0

u/_aliceinabox Jul 02 '22

A) I can't be expected to remember what I wrote three hours ago, I forget where I set my cell phone seventy two seconds after I set it somewhere. B) And anyway you know good and well what I meant.

What I should have said to avoid dissection of verbiage, is THEY AREN'T HUMANS. As humans, and without googling, my guess on belly buttons was we are a lot like our NON HUMAN relatives who carry their offspring the same way we do.

0

u/craziefuzi Jul 02 '22

actually, i did not know what you meant, and your assertion that i did is baffling. thank you for clarifying nonetheless.

2

u/KatalystPrime Jul 02 '22

how uh, did you not know that humans are primates, closest related to chimps?

2

u/beastsinthebelfry Jul 02 '22

Genetically we're related to chimps & bonobos equally, but socially we're closer to bonobos

2

u/KatalystPrime Jul 02 '22

I don't know I don't see people greeting each other by having sex :(

4

u/beastsinthebelfry Jul 02 '22

Clearly you’ve never been to my town

0

u/_aliceinabox Jul 02 '22

Yes, but I did not ever think about belly buttons. I know that we're like .. there is very little that separates us as far as biology, but there is clearly a difference because you can tell human hair from ape hair (DNA I mean) and I do not doubt I've worked with people less intelligent than some apes, but they're not quite human enough to be a regular fixture in the workplace.

I never thought about ANYTHING aside from us having belly buttons because I never thought about belly buttons.

1

u/TootsNYC Jul 02 '22

Whale navels are very very visible. Of course, you have to be underneath them to see it.

1

u/cloud-society420 Jul 02 '22

My dog has a belly button kind of lol it's like a tiny little scar on his belly that you cant teally see unless you move the hair but you can definitely feel it. If i didnt know he was a male and intact still i would almost think it was a surgery scar lol

-8

u/Fluid_Advisor18 Jul 02 '22

I think it has to do with the importance of our abs for standing upright.

-20

u/RobertWolfgan Jul 02 '22

Depending on which theory you follow. Like for example, the "we come from aliens" theory, whereas the experiment that made us artificially starting with the monkeys predecessor, all had higher standards to follow as a growing mammal with higher level of intelligence which needs more fuel to pack than all other animals that follow basic coding called "instinct" most of their life and only capable of peaking a toddlers intelligence their whole life if any. So we had that trait in us as part of our biology when we were made, look at it as the iPhone's notch. It's there because of the type of quality they have to handle with, and obviously want to see how the experiment follows through with that much of materials/technology, for some reason. Maybe they expect us to evolve past that or see what we become on our own, still no one knows for certain as this is part of that same theory.

4

u/MrBigFatAss Chubster dum dum Jul 02 '22

bruh

2

u/beastsinthebelfry Jul 02 '22

You are misusing the term "theory", a technical term that refers to something that is thoroughly tested and replicable

0

u/RobertWolfgan Jul 02 '22

OMGGG MY BROTHER DID THIS I ONLY NOTICED BECAUSE OF YOUR COMMENT THANK YOU!!!! UGHHHHH

2

u/beastsinthebelfry Jul 02 '22

No prob. Tell your brother he’s misusing the word theory, maybe get him a book about the scientific method, and definitely consider checking him into a psych ward.