Recent comments in /f/explainlikeimfive

_OBAFGKM_ t1_j226apu wrote

It's not really like that, since tau and pi only differ by a factor of 2.

A useful equation is, for example d = 1/p, where distance is measured in parsecs and p is measured in arcseconds. If you used meters, it's not just a factor of 2, it's something like 3.086×10^(16) d = 1/p. With distances as big as parsecs, there's no intuition you can use to understand the size, so it really doesn't matter what unit you use. It just makes the most sense to use the natural unit instead of the arbitrary one

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tomalator t1_j223vfu wrote

I'm not sure how random the placement of the embryo is, but I do know it can attach in the fallopian tube (ectopic pregnancy) and it can attach to either the front or back of the uterus, which affects how much you can feel kicks from the baby (fewer if it attached to the front)

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awolzen t1_j221a15 wrote

This is interesting and I could see how the weak gravity could cause biological problems like fetal orientation. Experimentally, I’m sure it’s (obviously) never been measured.

I think we’re also assuming the entire pregnancy was experienced in zero g. If the mother experienced a change g-force… that baby is gone. There are too many added biological variables to assume things would go right.

I also know nothing about the details of embryonic cell development. Hopefully someone with more insight can help us out. Is the place where a fertilized cell attaches to the uterine wall random?

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-WhatCouldGoWrong t1_j21rjce wrote

my eye doctor told me a story about an older dude in england. lived alone. his children came round now and then to make sure he was looking after hisself and his cupboards had food in them. for a decade or so this was the routine. one night he had a bad fall and during the course of his recovery and assessment if he could still live alone he went the doctors, they sent him to the eye doctors, the eye doctors concluded he was fully blind and had been for a long time

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There was a bit of investigation into neglect from the children had they just let him bumble around this house fully blind for a few years but ultimately they concluded his brain had built an image of his house, the furniture, everything within the property from when he could still see stuff, so though he could not see, he could still see how it all was in his brain so he never seemed like he was blind to his children

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I'd love to know if there's a link to that. It's a story that always stuck with me and made me wonder.

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police-ical t1_j21qezy wrote

Let's limit the answer to food/drink taste, which is actually more smell than taste. The brain is always trying to figure out if something in the mouth is good nutritious food or bad poison. In general, bitter and decomposed or moldy things=bad, sweet/salty/fatty/proteiny things=good, and sour is variable. The first time you eat something, you have limited information beyond basic patterns. Young babies need lots of nutrition and have parents to help, so they like all kinds of things, but toddlers are capable of finding something toxic, so they get pickier.

So, the first time you try coffee, your brain's reaction is likely "this is very strongly flavored and bitter, probably poison." Try it a few more times, and your brain gets used to it, confirms nothing bad was associated with it last time, and may start to associate it with positives like mild stimulation. Conversely, if you throw up after eating a food you used to like, it may be a while before you regain your desire for it--now your brain has evidence it was poison and should be avoided.

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oblivious_fireball t1_j21q8kh wrote

your stomach can destroy most, but not all. furthermore, it doesn't always destroy the toxins that these germs produce, either in life or as they die. food poisoning caused by salmonella, botulism, and E Coli are often results of the toxins they leave behind rather than the bacteria themselves.

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-ButDidYouDie- t1_j21pgdz wrote

I'm not sure I can explain it very well, but it's simply the "acquired" but you mentioned already. Through repeated exposure, you can make yourself come to like or accept a particular taste you didn't like before.

Traditionally "bad" tasting things like coffee and beer are a good example I think. At first, hoppy or bitter, we don't like it, but the more it is tried, and the different types we try, the more flavours we learn to detect and appreciate, going back to the original, you may find you taste something completely different, or you just started on something bad in the first place.

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Mental_Cut8290 t1_j21oone wrote

There are two forms of food-poisoning: too many pathogens that then grow in your body and make you sick out both ends while your immune system fights the growth, and toxins from spoilage that will have a more immediate rejection from the body.

The ones that grow in you have pretty good resistance to acids. (All are slightly different) And toxins just are, so acid won't necessarily break them down.

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rysworld t1_j21i80h wrote

You will gain fat if you eat a calorie

If you work out quite a bit but still eat an excess- consider as an example the novice sumo wrestler, eating 5000 kcals a day and expending 4000- you will gain mostly subcutaneous fat, or fat under your skin. This isn't completely harmless, but generally the effects detrimental to you are limited to a little bit of inflammation and a strain on your joints like knees and hips, which are only "engineered" to take a certain amount of weight.

If you are not working off a lot of those calories constantly, you will start to accrue fat around your organs, which is much worse for you. Your organs will have to work much harder to do their jobs in the middle of all that fat, and you will start to edge towards lipotoxicity as your body struggles to deal with free fatty acids, which seems to play at least partially a causative role in all sorts of nasty diseases, including the insulin resistance that leads to diabetes.

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tomalator t1_j21h9cw wrote

It's also important to note that the baby (well before birth) will flip upside down as a result of gravity. Without gravity the likelihood of a breach birth (feet first) is very high, and a breach birth is very dangerous.

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