Recent comments in /f/askscience
[deleted] t1_jdh8l34 wrote
Rolldal t1_jdh8ele wrote
Reply to comment by Dorocche in What’s the oldest know tortoise with a documented hatching date? by The_Real_Mr_F
Just for the record (sic) accurate records were kept in Great Britain from 1837 (Civil registration bill being passed in 1837) and France from shortly after the French Revolution. This is aside from the parish records some of which (especially the Methodist ones) carry a great deal of detail. The best of these latter records record not just the names of parents but the mother's maiden name, father's occupation, location (ie farm name for instance), and date of birth if it differed from that of baptism. In England law was passed in 1538 by the then new Church of England making the keeping of such records a legal requirement, though most parishes did not enact it until 1598 and even then records were patchy (not to mention disruption by Civil war in the 17th century). As with any sytem there will be those who slip the net.
UzbekNative t1_jdh88w6 wrote
Reply to comment by CrustalTrudger in Does the metal in the solid core of a rocky planet have any special properties? by VillagerNo4
So is that alloy molten all throughout or do we actually have like large smooth bearing ball inside the planet?
[deleted] t1_jdh7uvx wrote
Reply to comment by SabreToothSandHopper in Where do rumen bacteria come from? by ryum1503
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spuldup t1_jdh66dc wrote
Reply to comment by Dark_Believer in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
Having good spicy food in space would unlock the final achievement in my life.
[deleted] t1_jdh5j4x wrote
jatjqtjat t1_jdh58y5 wrote
Reply to comment by Cinnamongoil in Where do rumen bacteria come from? by ryum1503
Yea, its not true. It would mean if a round of antibiotics killed these bacteria off, getting them back would be... unpleasant.
Bacteria that eats cellulose is going to be found on the cellulose that the cow is eating.
The birth canal might give the calf head start. But it's not the only way.
[deleted] t1_jdh4zwo wrote
MrGronx t1_jdh4fqn wrote
Reply to comment by ClemClem510 in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
The amount of nausea and accompanied actually being sick is is officially known as space adaptation syndrome , but is unofficially measured on a scale known as the Garn Scale. The units range from 0 to 1 "Garn", where 1 Garn is as sick as an astronaut could possibly get.
The name comes from Republican Senator Jake Garn, the first sitting member of congress to go to space. He flew on STS-51-D as a payload specialist and as a subject on an experiment regarding space adaptation syndrome, and he didn't disappoint: he was so ill throughout the 167 hours of his mission that, ever since, astronauts coined the Garn Scale after him!
Cinnamongoil t1_jdh478r wrote
Reply to comment by tjeulink in Where do rumen bacteria come from? by ryum1503
what … source?! I never heard of this and I work in medical care.
auraseer t1_jdh29c4 wrote
Reply to comment by ChemicalRain5513 in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
Only very slightly. I read a study on this, and they found that the effect is almost too small to measure, affecting only odors that were barely perceptible in the first place.
This might be because it's nearly impossible for a person to be truly flat and immobile for long enough. They'll turn their head, lift it sightly from the pillow, etc., and even small shifts like that would affect fluid movements.
[deleted] t1_jdh11xw wrote
Reply to Where do rumen bacteria come from? by ryum1503
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[deleted] t1_jdh0qi2 wrote
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ClemClem510 t1_jdgzswh wrote
Reply to How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
That's a great question - our gut is a super interesting system, and microgravity does affect it in some ways, though obviously it still works up there.
One thing that's important to note is that your intestines are long, and honestly kind of all over the place. We're talking around 7 meters (20+ ft), going down, sideways, and sometimes up. Between that and the fact that we digest laying down a lot of the time, one realises that gravity pushing that food down isn't really the main driving force. What does most of that job is layers of smooth muscle, that contracts and pushes things along without you even being conscious of it. So the fact that things float up there is not a huge deal.
But lack of gravity does tend to do things to fluids, however. With gravity, they typically settle pretty well, with gases coming back up and separating from the liquids pretty cleanly. Since liquids also become floaty blobs in space, that stops being the case. This means that our usual ways of expelling gases - burping and farting - may stop just expelling gases. Notably, burps often come up with what feel like acid reflux, and, well, one shouldn't trust a fart in space (Google Apollo 10 floating turd for an interesting tidbit).
Another thing of note is that for many astronauts, arrival in space can be accompanied by space sickness, usually nausea, vomiting and a generally upset tummy. This is a digestive issue too, but one mainly caused by the sensory adjustment to space.
Kerwinkle t1_jdgyw1h wrote
Reply to comment by Dark_Believer in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
Ever wondered why airline meals seem to taste bland? Ask an airline meal chef about loss of taste on passenger flights. I'm sure it's not the same issue as spaceflight but a long haul flight also affects your sense of taste and smell. A good thing when you consider all the farts unleashed during those flights too.
seanbrockest t1_jdgyukp wrote
Reply to comment by zekromNLR in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
Longest stay on the moon was 75 hours, anybody know if they mentioned their sinus clearing during that time?
Crusty_Nostrils t1_jdgyh17 wrote
Reply to comment by LongLastingStick in Do insects have "meat" like other animals? I know that grubs, mealworms, etc. are eaten in some parts of the world, but if, for instance, beetles were the size of cows, could you butcher one and make beetle steak? by 9RFCat9
No, it has the guts, legs, and head on one end and then a sausage of muscle through which runs the alimentary tract. If you pull off the head and legs and carefully extract the guts you'll be left with the meaty part
[deleted] t1_jdgxys7 wrote
Reply to comment by h3rbi74 in Where do rumen bacteria come from? by ryum1503
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[deleted] t1_jdgxwzc wrote
Reply to comment by Dark_Believer in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
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zekromNLR t1_jdgxrpk wrote
Reply to comment by seanbrockest in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
We just don't know. There are no facilities that can produce extended hypogravity to study those longer-term effects. Honestly I think that would be as good a reason as any to construct a spin-gravity space station capable of up to 1 g: Conduct a study to see how much gravity is required for humans to stay healthy. Because if we are going to make permanent settlements on the Moon or on Mars, I think we should probably figure out beforehand if a third or a sixth of Earth's gravity is enough for humans.
[deleted] t1_jdgxgx5 wrote
Reply to comment by seanbrockest in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
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askscience-ModTeam t1_jdgx09o wrote
Reply to Why is AI bad at maths? by eagle_565
Thank you for your submission! Unfortunately, your submission has been removed for the following reason(s):
- This question is based on fundamentally flawed premises. Please conduct some background research and revise your question if you wish to resubmit.
Ech_01 t1_jdgwbdb wrote
Reply to comment by kompootor in Why do neurons have more dendrites than axon terminals/terminal buttons? by eyyyyy
Hi, I’m sorry but what’s wrong with what I said?
Clydosphere t1_jdgvx1l wrote
Reply to comment by KarmaScope in Where do rumen bacteria come from? by ryum1503
A good friend of mine often says jocularly, "I am in the majority!" Maybe I should give him that book for his next birthday? :)
[deleted] t1_jdh8ojh wrote
Reply to comment by Dark_Believer in How does the gravity (or lack thereof) on the ISS affect digestive systems of it's occupants? by Bob_Perdunsky
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