this post was submitted on 11 Jul 2026
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Science Memes

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A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



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Science isn't a filing cabinet of facts, it's a conversation. For example, a photo of an eel or other localized wildlife counts because most people never see one, and wonder is the first step of inquiry. A car meme counts if it makes you curious about what's under the bonnet. If you want to talk about something you noticed in the world, chances are someone else wants to talk about it too.

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[–] sbeak@sopuli.xyz 5 points 5 hours ago

I think that makes sense, water is absorbed into the bloodstream, right? And then the kidneys filter the blood and the bad bits + excess water is peed out. Which is why your pee looks saturated yellow if you are dehydrated and almost clear (but don't drink it!) when you have drank a lot of water.

Any remaining water in your digestive tract that isn't absorbed would be in your poos! If you have diarrhoea and your poos are all liquidy, that means water is not being absorbed properly (bad!)

I didn't do Biology, I'm a Physics+Chem student, so this could be completely wrong!

[–] TheStaffmaster@lemmy.world 7 points 7 hours ago

I mean, the water does have to come from SOMEWHERE, so strictly speaking that way of looking at it is not wrong, just ignoring a few steps.

[–] Tollana1234567@lemmy.today 7 points 8 hours ago* (last edited 8 hours ago)

peeing blood is a thing. liquid can come out of your intestines if you get norovirus.

[–] rumba@lemmy.zip 18 points 11 hours ago (1 children)

That, and then you realize that you primarily lose weight through your breathing.

[–] filcuk@feddit.uk 8 points 10 hours ago (1 children)

And how that is used to make trees

[–] LodeMike@lemmy.today 8 points 9 hours ago (1 children)

The atoms in the air you're breathing are billions of years old, and the molecules could have been made 5 minutes or a billion years ago. Probably both in the same breath.

[–] minorkeys@sh.itjust.works 1 points 8 hours ago (1 children)
[–] remotelove@lemmy.ca 2 points 6 hours ago

Well, it's kinda cool to look around and also realize that much of what you see likely came from multiple supernovae and/or kilonovae. (Huh. I have never needed to pluralize the word 'kilonova' before. Meh.. It looks cool with the 'e', so I'll leave it.)

Eventually, our atoms are going to get blasted out across the universe again to maybe become part of some other planetary system, before it eventually gets destroyed or sucked into blackhole and is evaporated as radiation. This might not even be the first universe our bits have been a part of ..

[–] harambe69@lemmy.dbzer0.com 2 points 6 hours ago

And so is breast milk.

[–] Hueristic_Autistic@lemmy.world 9 points 12 hours ago

Me just now

[–] PillowD@lemmy.world 14 points 14 hours ago (1 children)

Instead of 'You are what you eat.' it is "You are what you don't shit."

[–] TheHonorableT@lemmy.blahaj.zone 5 points 8 hours ago

...and haven't breathed out yet

[–] GreenKnight23@lemmy.world 4 points 12 hours ago
[–] Fleur_@aussie.zone 10 points 15 hours ago (1 children)

Pee come out of my penis tho????

[–] mrmisses@lemmy.world 6 points 14 hours ago (1 children)
[–] Kolanaki@pawb.social 8 points 13 hours ago (2 children)

Why is my piss coming out of y'alls dicks?!

[–] sparkyshocks@lemmy.zip 8 points 11 hours ago

You donate blood to save lives. I donate blood so that the recipients can pee my piss out of their dicks. We are not the same.

[–] Fleur_@aussie.zone 7 points 13 hours ago

He's putting his piss in our dicks! Get him!

[–] Reborn_Mormon@lemmy.world 34 points 20 hours ago (1 children)

Listen, urine comes from your no-no spot and I want to drink it straight from the tap because I am an alchemist and know urine's true potential. Please, everyone, pee on me to make me more powerful, and I will defeat Donald Trump in this next election...

[–] EvilBit@lemmy.world 17 points 18 hours ago (7 children)

You got reborn HARD, friend.

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[–] LovelyMover@lemmy.zip 13 points 17 hours ago
[–] Lemming6969@lemmy.world 46 points 21 hours ago* (last edited 21 hours ago) (5 children)

Guess where almost all your fatass has to go in order to lose it? Your lungs. You have to breathe out more than goes into your face hole. That's a lot of breathing.

[–] MrShankles@lemmy.world 7 points 14 hours ago

Finally, an upside to panic attacks!

[–] Art3mis@lemmy.blahaj.zone 21 points 18 hours ago

I used to try to exhale harder than inhaled to mestabolize alcohol faster when i got the spins so i could drink more.

Im 2.5 years sober now lmao

[–] BuboScandiacus@mander.xyz 15 points 18 hours ago (1 children)
[–] Kage520@lemmy.world 18 points 18 hours ago (2 children)

It's the krebs cycle. If you look at how sugar is broken down by the cells to make atp, the actual energy your cells use, it takes C6H12O6 (sugar) and makes it into a few CO2 and H2O, getting energy (atp) from breaking it down into the components. That CO2 is then exhaled, which is I think what OP is referring to.

Note: it's been a long time since I learned that in class so it is most likely somewhat incorrect

[–] AscendantSquid@lemmy.world 6 points 11 hours ago (1 children)
[–] MajorMajormajormajor@lemmy.ca 2 points 6 hours ago

Can ya feel it, Mr Krebs?

[–] gandalf_der_12te@feddit.org 12 points 17 hours ago* (last edited 17 hours ago)

it does check out. the CO2 travels from the cells through the blood into the lungs, where it is exhaled.

so technically what you exhale has a slightly higher mass than what you inhale, because it has an additional carbon atom.

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[–] TheGiantKorean@lemmy.today 163 points 1 day ago (8 children)

So I've technically let a girl bleed all over my chest? Ew!!

[–] EvacuateSoul@lemmy.world 10 points 17 hours ago* (last edited 17 hours ago)

The vaginal lube is blood plasma also

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[–] DarrinBrunner@lemmy.world 80 points 1 day ago (21 children)

It's all connected. It's a series of tubes.

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