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Saturday, November 10, 2018

What is flesh eating bacteria?

What is flesh eating bacteria?


What is flesh eating bacteria?

Posted: 09 Nov 2018 05:27 PM PST

Why is flesh eating bacteria such a problem? How come our bodies can't fight it? why can't we use antibiotics? Why isn't flesh eating bacteria so prevalent?

Edit: Wow didn't know this would blow up. Was just super curious of the super scary "flesh eating bacteria" and why people get amputated because of it. Thanks for all the answers, I really appreciate it!

submitted by /u/DefectMahi
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Why are you not supposed to use cellphones at gas pumps?

Posted: 09 Nov 2018 02:07 PM PST

Is a quadruple bond possible?

Posted: 10 Nov 2018 02:24 AM PST

Could an element with, say, an expanded octet form a quadruple bond with another element?

submitted by /u/OgreDragon
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White blood cells fight infection. But how does the body fight an infection in places where white blood cells aren't flowing, like in the bladder or sinuses?

Posted: 09 Nov 2018 10:21 PM PST

Do gluons have different wavelengths?

Posted: 10 Nov 2018 02:58 AM PST

i Know there are 10 kinds of gluons, with different colour and all, but i was wondering if, like photons, they too could have different wavelengths. If so, what tells us that quarks don't constantly emit a wavelength of gluon that would travel outside the nucleus since it doesn't interact with the up and down quarks, kinda like radiowaves.

submitted by /u/QSAnimazione
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How does Everett's Many Worlds Interpretation (MWI) of quantum mechanics conserve energy or deal with the scaling factor for each world?

Posted: 10 Nov 2018 04:11 AM PST

I've seen some videos on Everett's Many Worlds Interpretation of Quantum Mechanics(WM) and it is quite appealing after some thought especially with how it deals with the the measurement and wave-function collapse problems. But I've just got a couple questions abo

Lets say you have a particle when say something become a superposition the state evolves as a as a wave function in a superposition state but on measurement only a single state is measured.

In the Copenhagen interpretation the wave function collapses to a single state that depend on the probability distribution of the wave function.

Now with the MWI interpretation the wave-function doesn't collapse and just continues to evolve. The probabilities come from the probability that the observer is in a specific state.

Let's use a simple example of a system that has a photon in the up state which is used to create a photon in a superposition of up and down. I apologize over my notation, but assume everything is a wave function:

w0=u

y w0 = y u

w1 = y u

w1=1/(2^0.5)(u+d)

So say you measure the photon and you get u, the universal state in the MWI at the second measurement means you are in state 1/(2^0.5)u. This is a factor of square root of 2 smaller than the original state of u. As the universe evolves you'd get more and more scaling factors. So my question is:

Why don't the scaling factors have any effect or impact on the world. My naive view is that each universe has reduced amount of energy compared to the parent universe. I have no idea if the scalling factor has anything to do with energy but I'd like some experts to explain what is going on

submitted by /u/unparag0ned
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Do certain blood types protect you better than other ones?

Posted: 09 Nov 2018 07:28 PM PST

How do we know how far bodies in space are from us?

Posted: 09 Nov 2018 04:19 PM PST

Recently I saw an article stating "oldest star found." How do we know, since all we can do is basically look at the sky. It's not like we've been staring at a spot in the sky for millions of years and a star suddenly appears. Maybe something to do with measuring movements...? I don't see how we can know how old something is just by looking at it, especially when they all look the same (from our point of view).

submitted by /u/Cerusin
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Could HIV/AIDS help with an autoimmune disease?

Posted: 09 Nov 2018 09:20 PM PST

So obviously this seems like a bad idea and wouldn't be recommended but could having HIV especially in the later stages help an autoimmune disease?

submitted by /u/lastwaun
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Is there a theoretical upper bound on the critical temperature of a high-temperature superconductor? (I.e. a "Carnot efficiency" for HTSCs)

Posted: 09 Nov 2018 01:27 PM PST

When the continents move farther from each other, would they just combine, or collide?

Posted: 09 Nov 2018 11:08 AM PST

Sorry if my question doesnt make sense. But our continents are moving slowly apart from each other, if I recall.

So wouldnt they eventually meet? Would they collide into each other or just sorta combine? If they collide would it be like an earthquake?

submitted by /u/catmality
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Why does the blood flow in the brain have a different Reynolds number than the aorta?

Posted: 09 Nov 2018 07:37 AM PST

Hi !

I was reading the wikipedia article on Reynolds number and came across the fact that the typical Reynolds number for blood flow for the brain is a factor of 10 smaller than the Re for the aorta, could anyone give a short explanation of what it means and why exactly there's such a big difference?

Thank you in advance !

submitted by /u/karlej
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Why is it called an α-1,β-2 glycosidic linkage?

Posted: 09 Nov 2018 09:52 PM PST

My professor told me that it was called an α-1,β-2 glycosidic linkage because the oxygen is between the 1' carbon on the α-D-Glucose molecule and the 2' carbon on the β-D-Glucose, but as it seems in this diagram, the oxygen is between the 1' carbon on both molecules. What am I missing?

submitted by /u/denz609
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What supports neurons in the brain? Is it just neurons in liquid?

Posted: 09 Nov 2018 11:06 AM PST

Do people born blind have 3D good spatio-temporal intuition?

Posted: 09 Nov 2018 08:38 AM PST

I come from Machine Learning with a neuroscience-y question. Basically, some models that we train to interact with an environment often benefit from a good amount of "Newtonian" and causal priors. Very often, these priors are embedded in the visual system of the Machine Learning model, as priors over local displacements, or as visual contingency awareness. Doing so in the visual domain is often much easier than in an abstract domain.

This made me wonder if we have clues as to whether our brains really require vision in order to learn such things or if we have a "signal-type-agnostic" learning mechanism that just learns about intuitive physics.

This led me to wonder if blind people lack some spatio-temporal intuition that non-blind people have, or if vision is a required ingredient for some class of physical reasoning tasks.

Thanks!

submitted by /u/manux
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Are fully charged batteries technically heavier than batteries with no charge?

Posted: 09 Nov 2018 08:28 AM PST

Is there any evidence that points to writing notes Paper&Pen helps you remember what you wrote more than another form of note taking like typing or Vice Versa?

Posted: 09 Nov 2018 05:22 AM PST

I was wondering what the best way to take notes is and I wanted to know if there was any scientific backing in the most optimal form of note taking.

submitted by /u/Crazymage321
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In what way is spin related to the standard model?

Posted: 09 Nov 2018 09:29 AM PST

And how come the bosons have 1 as spin number and the fermions 1/2?

submitted by /u/SvHaps_
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Could gerrymandering be improved if you forced every district drawn on a map to be a quadrilaterial?

Posted: 09 Nov 2018 07:27 AM PST

Obviously it'd be better if we could just have an algorithm draw the districts. But could something like this be a simple bandaid to solve problems like Illinois's 4th congressional district?

submitted by /u/Bladelink
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Do we have any idea what our solar system's previous star was like?

Posted: 09 Nov 2018 09:31 AM PST

I've read our sun and planets formed from the remnants of an exploded star that was here before. Can we tell anything about it from the material composition of our solar system?

submitted by /u/light24bulbs
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Why don't whales have a high risk of cancer if they have a large amount of cells?

Posted: 09 Nov 2018 02:56 AM PST

It makes sense. Whales have more cells than most animals so they must have a high risk of cancer. But they don't. If not. Less than humans as they live much longer. Why is that?

submitted by /u/BurntToast01
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How is the Earth affected by other planets orbits?

Posted: 09 Nov 2018 07:36 AM PST

As planets orbit the sun, how does it affect the Earth as other planets come "close"?

submitted by /u/Mitsuman77
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Friday, November 9, 2018

Why my phones touchscreen sometimes registers a touch when in reality my finger is millemeter or two from screen?

Why my phones touchscreen sometimes registers a touch when in reality my finger is millemeter or two from screen?


Why my phones touchscreen sometimes registers a touch when in reality my finger is millemeter or two from screen?

Posted: 08 Nov 2018 11:57 PM PST

My guess is static electricity since it only happens once in a while and randomly but i am hoping for more insightful explanation.

Edit: It also usually happens in the middle of typing. It never happened, for me, on first letters I typed. And, I am sure my finger did not touch the screen in a way i just did not feel it. When it happened i was surely away from screen, that is why it always jumps out when it happens. It is always unexpected.

Edit2: I can surely replicate phone registering very soft touches (without me feeling actually touching it) but those random ones I am experiencing are different, the finger is always a lot further away than when i can register a touch without feeling it by testing. A lot may be very relative term but that is how it feels to me, i am not really sure how far the finger actually is because it usually happens really fast and its hard to measure so small distances with feelings. So, there is a small chance that i am imagining it.

Edit3: I am using Redmi 5A if that makes any difference.

Edit4: I searched my phone but did not find any settings that increase screen sensitivity or glove mode or anything like that. It is an android 1.7.2.

submitted by /u/Dreamer_tm
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[Earth Sciences] Is there a current example of a mountain range that is just starting?

Posted: 08 Nov 2018 04:07 PM PST

I have heard that the Himalayas are young and still growing. And that the Rockies are young and large, while the Appalachians are old and being worn down. Is there a good example of a small mountain range (hills?) in the world that is in the early stages of its development, it has the potential to grow into a full-scale mountain range?

submitted by /u/MDCCCLXV
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Does Hale Bopp belong to the solar system? Or does its trajectory just go through the solar system from time to time?

Posted: 09 Nov 2018 05:25 AM PST

Augmented reality 7D holograms - how does it make it look like the light stops mid-air?

Posted: 09 Nov 2018 02:57 AM PST

After discovering this video: https://youtu.be/rD1_C_RAJeE?t=177 I immediately wondered how did they manage to do it? How can the light carrying information about the reference object just stop mid-air? I know it can´t but that´s how it looks like (no pollen, no small particles, no visible gas etc.) and no method of projecting light to create a 3rd object in space seems to apply.
Any explanation? I have found out that RIOT (company behind the ceremony from the video) got this marvel from this company https://www.zerodensity.tv/products/reality/

I have tried to google this question and came up with little to nothing - this question https://www.reddit.com/r/askscience/comments/8fjbl9/how_exactly_do_holograms_work_how_does_the_light/ seems related, but I couldn´t find a satisfying explanation.

Thank you for your responds!

submitted by /u/Teiresias13
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Is there any "up" direction to the universe? Every map of earth is drawn "right side up", but how do we know that? what measure has everyone been using?

Posted: 08 Nov 2018 06:43 PM PST

is there any sort of marker of "up" and "down" in the universe? if so, what?

submitted by /u/OneEyedCharlie
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Say you know the dirrection the Milky Way is headed and you launch a rocket going towards the dirrection the Galaxy was coming from, from our prospective, would it appear to be going faster than a rocket launched in the same dirrection our galexy is headed to?

Posted: 08 Nov 2018 09:06 PM PST

Sorry if my grammar made this hard to read.

submitted by /u/five_chickens
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At one point in time was the universe background radiation the same wavelength as the radiation we use in microwave ovens?

Posted: 08 Nov 2018 05:34 PM PST

I was thinking about what a cataclysmic event this would be in terms of liquid water forming in the universe and any effect it would have on life if it existed at the time. This question I've been meaning to ask for a long time...

submitted by /u/Kavster92
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Bio-Savart law states: A moving point charge creates magnetic field. What is the motion of the charge relative to?

Posted: 08 Nov 2018 03:38 PM PST

Is it relative to the observer, earth's surface or something else?

submitted by /u/ClueTime2I
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How do you store plasma?

Posted: 08 Nov 2018 05:44 PM PST

I know it can be generated in various ways but can it be stored for any meaningful length of time?

submitted by /u/Biocrypt
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How do people with amnesia remember how to speak?

Posted: 08 Nov 2018 08:55 AM PST

Is the generation of a planetary magnetic field reliant upon the presence of a solid inner core?

Posted: 08 Nov 2018 03:09 PM PST

Are femtosecond lasers synonym to ultrafast lasers?

Posted: 08 Nov 2018 10:46 AM PST

As in the title above, are those synonyms or ultrafast lasers is broader term that contain femtosecond lasers?

submitted by /u/uncross97
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Thursday, November 8, 2018

AskScience AMA Series: Let's talk about genetic counseling! We are experts from Johns Hopkins Medicine here to answer your questions about genetic counseling, DNA tests, and the importance of family history when talking to your doctor - AMA!

AskScience AMA Series: Let's talk about genetic counseling! We are experts from Johns Hopkins Medicine here to answer your questions about genetic counseling, DNA tests, and the importance of family history when talking to your doctor - AMA!


AskScience AMA Series: Let's talk about genetic counseling! We are experts from Johns Hopkins Medicine here to answer your questions about genetic counseling, DNA tests, and the importance of family history when talking to your doctor - AMA!

Posted: 08 Nov 2018 05:15 AM PST

Hi Reddit, we are Natalie Beck, Katie Forster, Karen Raraigh, and Katie Fiallos. We are certified genetic counselors at Johns Hopkins Medicine with expertise across numerous specialties including prenatal, pediatric and adult genetics, cancer genetics, lab and research genetics as well as expertise in additional specialty disease clinics.

We'll start answering questions at noon (ET, 17 UT). Ask us about what we do and how the genetic counseling process works!

AskScience Note: As per our rules, we request that users please do not ask for medical advice.

submitted by /u/AskScienceModerator
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If Cacti are known for growing in the harshest of environments, Why don't we see them in non-harsh environments?

Posted: 07 Nov 2018 02:50 PM PST

They protect themselves from predators, don't need a lot of water. So why don't they dominate vegetation in other places?

submitted by /u/jawhett3
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What are the consequences of missing a full night of sleep, if you make up for it by sleeping more the next night?

Posted: 07 Nov 2018 08:34 AM PST

My scientific curiosity about this comes from the fact that I just traveled from the telescopes in the mountains of Chile all the way back to the US and I wasn't able to sleep a wink on any of the flights, perhaps maybe a 30-minute dose-off every now and then. I sit here, having to teach tomorrow, wondering if I should nap now, or just ride it out and get a healthy night's sleep tonight. I'm worried that sleeping now will screw me into not being able to fall asleep tonight.

I did some of my own research on it, but I couldn't find much consensus other than "you'll be worse at doing stuff." I don't care if I'm tired throughout today, I'll be fine---I just want to know if missing a single night is actually detrimental to your long-term health.

Edit: wow this blew up, thank you all for the great responses! Apologies if I can't respond to everyone, as I've been... well... sleeping. Ha.

submitted by /u/djsedna
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When a massive star crumbles into a neutron star, the protons and electrons of the atoms that make up the star combine to become neutrons. But since the electric charge of a proton and am electron is equally opposite, so is one proton fuse with one electron is enough to become a neutron?

Posted: 08 Nov 2018 01:18 AM PST

How does the 30mm A-10 warthog gun penetrate tanks, when a 105/120 mm tank gun has trouble doing that?

Posted: 07 Nov 2018 09:55 PM PST

How does marijuana farming impact soil health in comparison to a standard crop such as corn?

Posted: 08 Nov 2018 06:13 AM PST

How do babies use/learn language?

Posted: 08 Nov 2018 07:15 AM PST

I've always been fascinated by this: babies who can recognise their mother tongue and separate it from foreign languages they haven't heard often. How do babies start learning a language (and why is it so difficult for adults to learn one), what makes them prefer their mother tongue and how do they interpret what adults are telling them?

submitted by /u/YmiXZeno
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Do other mammals (or animals in general) "lose their voice" like we do?

Posted: 08 Nov 2018 04:58 AM PST

Are radio waves affected by the dopler effect, Why don't I hear a distortion as I'm driving towards or away from a radio station?

Posted: 08 Nov 2018 12:51 AM PST

Human fingertips wrinkle in water to aid with grip. Are there any other examples of similar evolutionary traits in land based animals when they go into water, or water based animals when they come up onto land?

Posted: 08 Nov 2018 05:54 AM PST

Is there a known limit to the amount of horse power an internal combustion engine can produce given set units of air and gasoline?

Posted: 08 Nov 2018 04:38 AM PST

Obviously if you increase the volume of air and fuel into the engine, the engine will produce more power via forced induction or through increasing the size or number of combustion chambers, but if given a set volume of air and fuel, is there an upper limit to the amount of horse power an engine can produce using real-world physics? I'm hoping there's an answer like "In a 2.5l engine, one gallon of 89 octane gasoline burned per minute cannot produce more than 400hp"

I'm specifically thinking about consumer-grade gasoline commonly found at gas stations, not special blends like E85 or racing fuels.

submitted by /u/___cats___
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How long does it take for supplements like calcium or vitamin B to be absorbed?

Posted: 07 Nov 2018 06:03 PM PST

I want to know how long it takes for a supplement to be absorbed into your body and make a difference in someone's body. For example, if someone just discovered they were anemic and we're taking an iron supplement, how long would it take for their iron levels to go back to normal?

submitted by /u/mfldjoe
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Are and how are DNA repair mechanisms in plant cells different than those in animal cells?

Posted: 08 Nov 2018 07:40 AM PST

Has there been any relevant work recently?

submitted by /u/Amoritas
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What is the C3 convertase made of?

Posted: 08 Nov 2018 07:25 AM PST

Is the C3 convertase in the classic complement pathway a mixture of C4bC2b or C4bC2a? Is 2a the previous name for 2b and that's why some refrences say it's 2a?

submitted by /u/AugustineD2
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Are fat cells lost when there is fat atrophy or do they just become smaller?

Posted: 07 Nov 2018 08:43 PM PST

Why are there so many citrus fruit hybrids?

Posted: 07 Nov 2018 05:43 PM PST

Many of the fruits belonging to the genus Citrus are hybrids... why is that so? What makes then so easy to hybridise than other genera? And how is it possible that their hybrids can reproduce?

submitted by /u/Stelliger
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What's the deal with beer bellies?

Posted: 07 Nov 2018 05:31 PM PST

There's definitely a distinctly round belly that is often associated with drinking lots of beer, but why?

I know you can't work out certain parts of your body to target your weight loss, I assume you can't target your weight gain either.

Maybe I'm just not very observant, but I don't know if I've ever seen a woman with a beer belly. Is this an exclusively male thing?

submitted by /u/BiJa90
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When a photon hits a mirror and goes from v=c to v=-c is there a moment when v=0? Does the mass of the photon decrease during this time?

Posted: 07 Nov 2018 05:24 PM PST

Is a solar system with breathable air within the interplanetary space possible?

Posted: 08 Nov 2018 12:29 AM PST

Okay, i watched some 80ies cartoons, and now I have strange questions.

Is it possible to have a solar system which has breathable air, not only on planets which can hold an atmosphere, but also in the interplanetary space between them?

Could something like that work without the air dispersing, or the whole system getting "too heavy" etc.

Any Ideas?

submitted by /u/Alexander556
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Why is there only one predominant variety of banana?

Posted: 07 Nov 2018 07:42 PM PST

There are dozens of varieties of apples. What's different about banana cultivation?

submitted by /u/Son_of_Mythpunk
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Why is saline solution and not pure water used for storing contact lenses, washing eyes etc.?

Posted: 07 Nov 2018 07:36 PM PST

Have there been any species once believed to be two distinct species but later proven that one is the juvenile form of another?

Posted: 07 Nov 2018 05:17 PM PST

I was reading an article about the book "All Yesterdays" and the appendix includes an "All Todays" section where the authors consider how future paleontologists might interpret the fossil record of today. One thing that stood out was that tadpoles might be construed as some sort of fish. Have any species been classified as distinct until advances in science proved that they were different stages of the same animal's life?

submitted by /u/GodMonster
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