Recent comments in /f/todayilearned

Oro-Lavanda t1_jdn4isa wrote

yo this makes so much sense. I visited a mountain town in colorado once for a ski trip and I was trying to boil some ramen on the stove. pacakge said like 3-4 minutes but it took me 7-9 minutes or more just to boil it properly! I thought the stove in the place I stayed at was just a low quality one.

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coolpapa2282 t1_jdn4f82 wrote

In The Enchanted Forest Chronicles (the first book specifically) there's a princess whose family keeps trying to get her into a fairy tale situation but it never works. They invite a wicked fairy to her christening, but the fairy just eats a lot of cake and dances with her uncle all night. She helps an old lady in the woods who's a powerful witch in disguise, but the blessing she gets is to never have any cavities. Etc.

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Beli_Mawrr t1_jdn4bb1 wrote

Right, that's what I'm saying. Pop a tiny hole in it, Watney-style, then the vacuum of space hopefully sucks the water out through it. When it's done, plug the hole again. If it gets bad again, open 'er back up!

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snowbirdnerd t1_jdn46y4 wrote

There are so many things that can go wrong and all these bills banning abortion ignore them. Some of the worse are defects that aren't dangerous to the mother but will absolutely kill the baby after it's born. Ectopia cordis is where the baby's heart develops outside the chest cavity, it doesn't cause problems in utero but is deadly once born. Only a few surgical specialists in the world can even try to treat it.

It is fucking monstrous to force a woman to carry a child to term knowing that it will die hourse if not minutes after birth.

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_Haverford_ t1_jdn2pkz wrote

Honestly, I was kinda bummed. I was hoping for like, Sichuan plantanos. But stepping into a Quito Chinese restaurant and having it look EXACTLY like any Chinese restaurant in the US was quite a surreal experience. I even think there was an owner's kid doing homework in a booth!!

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marsokod t1_jdn2kuc wrote

It won't work, there is a protection for that. You can open it but then the suit will prevent air from leaking out there. Better lose your hand than the whole suit.

The only option was to drink it, but unless you absolutely know where the leak is from it can potentially kill you.

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_Dnikeb t1_jdn2keh wrote

This article explains it very well.

Here's a shorter version of the story: some viruses exist as virions, ie. the virus itself is hidden within a little envelope of phospholipids. On the surface of this envelope, there is a protein called syncytin that can merge cell membranes (also made of phospholipids). Its role is to fuse the virion with the cell membrane so that the actual virus inside the virion can trojan horse itself into the cell and infect it. Infection consists of the virus releasing its DNA in the cell's cytoplasm, turning the whole thing into a virus factory. Sometimes, the virus' DNA gets fused together with the host cell's DNA. When that happens, that's what you'd call a retrovirus.

Now, At some point some 200 million years ago, for some freaky joke of nature, a virus entered a mammalian egg cell, transitioned into a retrovirus, that egg cell got fertilized, and the result was a mammal that could produce its own syncytin and thus have the ability to merge cell walls. That allowed for the evolution of a structure known as syncytiotrophoblast, which develops on the point of contact between the embryo and the womb and is basically created by many embryonic cells merging together into a single cavity. The whole point of this structure is to act as a buffer zone, allowing nutrient exchange between the mother and the embryo while at the same time preventing the mother's immune system from reaching the embryo and killing it. Thus the placenta was born.

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Paladin327 t1_jdn26qf wrote

It’s not like poking a small hole in a space suit would cause instant decompression of the entire suit. The difference in pressure isn’t big enough for that. There was a 2mm hole on a spacecraft docked with the ISS, and it was determined that was no danger to the station and could easily be repaired

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effemeris t1_jdn1x6d wrote

Serious question: Why don't EVA suits have an emergency air-straw?

I know that drowning is one of the biggest risks on EVA (water leaks, coolant leaks, vomiting, etc), and I would have assumed that the simplest safety feature would be a simple tube that the astronaut could reach with their lips, and would provide enough air to live, even if the helmet otherwise filled with liquid.

Is there some technical or practical reason why they don't?

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