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Sunday, September 16, 2018

As we begin covering the planet with solar panels, some energy that would normally bounce back into the atmosphere is now being absorbed. Are their any potential consequences of this?

As we begin covering the planet with solar panels, some energy that would normally bounce back into the atmosphere is now being absorbed. Are their any potential consequences of this?

As we begin covering the planet with solar panels, some energy that would normally bounce back into the atmosphere is now being absorbed. Are their any potential consequences of this?

Posted: 16 Sep 2018 06:30 AM PDT

Why do salt crystals form in almost perfect cubes?

Posted: 16 Sep 2018 05:19 AM PDT

At the beginning of last summer I left a bottle with a salt and water substance out in the living room. when we came back from vacation the water was gone and in bottle salt crystals had formed.

Now what I don't understand is how the crystals formed in almost perfect cubes. Shouldn't there just be a thick flat layer of salt at the bottom?

submitted by /u/Cuber32
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Is there a connection between the age of newborns mother and the life expectancy of the baby?

Posted: 16 Sep 2018 03:31 AM PDT

For example will a baby born to a mother who is 20 have a longer life expectancy of a baby born to a mother who is 50 or vice versa?

submitted by /u/FrostedShreddies_
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Why does meat from different animals taste different?

Posted: 15 Sep 2018 06:18 AM PDT

Did the Classic period Abandonment in the Maya Lowlands have an effect on the epigenetics of Maya peoples in the Postclassic or more recent times?

Posted: 16 Sep 2018 07:29 AM PDT

I know that some, but not all, Lowland cities experienced drought and/or famine during the Abandonment. I was curious whether the possible dietary stress from this several century event had an effect on the epigenetics of Maya people in the subsequent Postclassic or even historic/modern periods. I understand that preservation of skeletal remains in the region is not great and that this question may be unanswerable at this time.

submitted by /u/Mictlantecuhtli
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What makes the immune system see transplanted organs as "non-self" and is there theoretically a way to convince it otherwise?

Posted: 16 Sep 2018 04:06 AM PDT

After getting a transplant the body is constantly trying to reject the new organ, despite it being healthy human tissue doing it's job, and despite the rejection probably leading to death. What makes the immune system see, for example, my original lungs as "mine" but my transplanted lungs as an "invader"?

AFAIK the only current way to manage this problem is to cripple the immune system so it can't do its job, which brings along it's own set of problems. Is there any work being done in the direction of convincing the immune system that the new tissue belongs, or at least some more targeted way to hide just that tissue from the immune system?

submitted by /u/KutuluMike
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Why is Tantalum the rarest stable element in the solar system?

Posted: 15 Sep 2018 10:40 AM PDT

Why don't neutrons in neutron stars decay into protons and electrons like free neutrons?

Posted: 15 Sep 2018 09:29 AM PDT

Why do Higgs bosons mediate mass? Is there a possibility that everything that has mass is made of Higgs bosons at the deepest level?

Posted: 15 Sep 2018 12:15 PM PDT

how do grades of fuel work?

Posted: 15 Sep 2018 08:46 PM PDT

my car requires 89-octane fuel or above in order to run smoothly. i've never really questioned it–i pay for the more expensive fuel and move on. but what does this mean? what makes a higher grade fuel, and why is it that certain engines can only function with higher-grade fuels? if i put 87-octane fuel in my car, would it run, just poorly, or would it not work at all?

submitted by /u/parmesann
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Are incest restrictions a social construct or do they exist in other animals?

Posted: 15 Sep 2018 01:57 PM PDT

We've been watching the local deer over the past few years. A year or two ago we had a rare set of triplets born: a buck and two does. They're still hanging out together... along with two new additions. My wife and I have been wondering if the new pair could be the prodigy of the buck and a sister or if another buck was responsible. That led us to the greater issue: is the prohibition against incest social or does it exist on a more fundamental hard-wired level?

Is there a general biological imperative to avoid mating with siblings/close relatives? Does it vary among species? Do primates treat incest differently than dogs, for example? What are the resultant problems (provided inbreeding doesn't recur multiple times across generations)?

submitted by /u/gunnk
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How does cultivated wild rice differ from *wild* wild rice? Has it been domesticated? If so, in what way?

Posted: 15 Sep 2018 09:41 AM PDT

Why do protons have multiple combinations of color associated with their quarks?

Posted: 15 Sep 2018 12:06 PM PDT

From my really basic understanding of QCD, I'm lead to believe that quarks need to exist in a singlet state with no observable color ("white"). As an example, if we've got a red up quark, a blue up quark, and a green down quark, why do these quarks exchange gluons to change their respective colors if they're already in a singlet state?

And a follow-up question: why are singlets formed by quark-antiquark pairs not as stable as baryons?

submitted by /u/EnragedFicus
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Is there any reason to not grow plants in 24hr light?

Posted: 15 Sep 2018 07:49 AM PDT

Why is it the rectus abdominis is made up of 6/8 pack (with tendons between them?) instead of one whole ab muscle?

Posted: 15 Sep 2018 01:47 PM PDT

Why do hurricanes rotate?

Posted: 15 Sep 2018 03:57 PM PDT

I'm reading it's from the Coriolis force, which is the earth rotating. Does this mean as the hurricane spins it drains angular momentum from the earth's rotation?

Secondary question: reading that hurricanes form when warm water in the ocean evaporates. This cools the ocean. Also read that hurricanes emit infrared light into space. Is this a cooling effect on earth as energy is lost into space?

submitted by /u/hvgotcodes
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Emotional behavior in humans and other animals and their neural underpinnings, are they comparable?

Posted: 15 Sep 2018 03:55 PM PDT

Much of research on the neural basis of emotional behavior is carried out in mices and other animals. My questions is: to what extent are the findings from those studies applicable to the comprehension of the neural basis of human emotional behavior?

submitted by /u/roteschildkroete
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Although it’s highly unlikely, what would happen if a hurricane were to cross the equator? Would the rotation direction change because of the Coriolis effect or stay the same?

Posted: 15 Sep 2018 08:11 AM PDT

Why don't rockets use variable geometry nozzles like on military turbojets?

Posted: 15 Sep 2018 02:50 PM PDT

Why doesn’t grass grow in winter?

Posted: 15 Sep 2018 10:06 AM PDT

BPA is widely accepted as being toxic. However, bottles and other storage containers aren't truly made of BPA; they're made of a polymer derived from BPA. It is my understanding that polymers lose most of the characteristics of their monomer, so what is the concern with BPA plastic?

Posted: 15 Sep 2018 12:54 PM PDT

How do you dispose of volcanic ash post eruption?

Posted: 15 Sep 2018 10:19 AM PDT
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Saturday, September 15, 2018

If I were holding a handful of DNA, what would it look like?

If I were holding a handful of DNA, what would it look like?

If I were holding a handful of DNA, what would it look like?

Posted: 14 Sep 2018 02:42 PM PDT

And how much would a handful weigh?

submitted by /u/Ohm_eye_God
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If numbers can be infinitely large, can they also be infinitely small?

Posted: 15 Sep 2018 04:49 AM PDT

A friend told me the following math problem:

Imagine you are walking to the bus stop. Your current position has a value of 1, the bus stop has a value of 0, and the distance between the two can be represented by a decimal. Before you reach the bus stop you must first reach half way to the bus stop (0.5), and then you must reach half way between that point and the bus stop (0.25), and then you must reach half way between that point and the bus stop (0.125) and so on and so on, I think you get the picture. If you must first pass an infinite number of places before reaching the bus stop, mathematically how do you actually reach it?

​

If you continue this process infinitely, simple math would suggest that you will never reach the bus stop, but we know that we can reach it in a real world example. Is this because as numbers get very small they must approach a finite value?


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So, Nuclear Subs can stay submerged for about as long as they can keep the crew fed and sane - no worry of oxygen. Why cant we make a space station like that - without worry of oxygen running out?

Posted: 14 Sep 2018 12:01 PM PDT

Why do some vaccines need multiple doses to be effective such as HPV vaccine? And some only need one dose? When the vaccine needs multiple doses does it only protect after the final dose if not when are you protected?

Posted: 14 Sep 2018 12:54 PM PDT

When is something classified as a solid as opposed to a very thick liquid?

Posted: 14 Sep 2018 12:46 PM PDT

Are things like Ice Cream, Commitments (Mayo/Ketchup), Engine Grease counted as liquid?

submitted by /u/Da_b_guy
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How do we know what neurons look like?

Posted: 14 Sep 2018 11:49 AM PDT

So Alpha Draconis and Polaris have been pole stars - what other stars have been/will be pole stars?

Posted: 14 Sep 2018 04:00 PM PDT

Why electron-phonon coupling can decrease phonon energy?

Posted: 14 Sep 2018 10:25 AM PDT

I recently followed a course of "solid state physics" and studying I found out that exists "phonon softening" that can be the signature of supeconductivity in some materials. As far as I know this is because a strong coupling between electrons and phonons lower the energy of phonons as I increase the dopant level. But why is so? I imagine the topic is pretty deep, so if you have also some article to suggest I would be happy

submitted by /u/Background_Jackfruit
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In earth orbit, there's a 5-10,000km gap of relative "calm" between the Inner and Outer Van Allen Radiation Belts. Would this be a good place to build a future space station?

Posted: 14 Sep 2018 10:02 AM PDT

And if a station could safely be built in this orbital gap, could it be used to assemble, test, and then launch large spacecraft to places like Mars?

submitted by /u/Sylvester_Scott
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Do objects really always fall at the same rate?

Posted: 14 Sep 2018 02:05 PM PDT

If two objects of differing sizes are dropped at the same time, they fall at the same rate, because while the larger object has a greater gravitional force acting on it, it also has a greater resistance to that force.

BUT: What if those objects were dropped on opposite sides of the Earth? Would the larger object pull the Earth in its direction an infinitesimal amount and "fall" faster? And, therefore, if the two objects were dropped at different times in the same area, wouldn't the larger object have a slightly faster perceived acceleration?

submitted by /u/lcblangdale
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Friday, September 14, 2018

What happens to sea life during a hurricane?

What happens to sea life during a hurricane?

What happens to sea life during a hurricane?

Posted: 13 Sep 2018 01:42 PM PDT

If it were possible to put a pipe straight through the earth, from north to south pole and you dropped a ball down the pipe what would happen?

Posted: 13 Sep 2018 09:48 PM PDT

If a person is paralyzed from the neck down, does that paralyzed body still react to temperature changes? Sweat and goosebumps?

Posted: 14 Sep 2018 05:49 AM PDT

Does the Transit method limit our ability to detect planets further out from their star?

Posted: 14 Sep 2018 03:24 AM PDT

I understand that the Transit method is the best current way to find exoplanets, but I was just thinking about how a planet like Jupiter takes 12 earth years for one Jupiter year, would that mean that we'd probably be completely unaware of the largest planet in the solar system (and gas giant with the shortest year) even if we've been examining it's star closely for a whole decade?

Following on from that, could that mean that we've got an extremely skewed perception of the makeup extra-solar systems? Maybe systems more like the solar system are common with large planets on the outskirts but we can't really see that with the transit method?

submitted by /u/Khwarezm
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What does it actually mean for a hurricane to make landfall? What are the criteria?

Posted: 14 Sep 2018 06:02 AM PDT

Is there something equivalent to hurricanes but underwater?

Posted: 14 Sep 2018 04:27 AM PDT

Because light has momentum, can it move an object with a defined mass?

Posted: 13 Sep 2018 05:38 PM PDT

Could light be used say in space to move a spaceship at high speed?

submitted by /u/chardeazy22
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If we could somehow build a "space elevator" as depicted in sci-fi, would the piece at the top up in orbit have "Earth Gravity" or would it be similar to what one would experience on the ISS in terms of weightlessness?

Posted: 14 Sep 2018 04:31 AM PDT

Why did it take humans so long to advance technologically?

Posted: 14 Sep 2018 03:15 AM PDT

Modern humans have been around for at least 40,000 years (some sources say 300,000), yet the first somewhat advanced civilizations came into existence around 3000 BC. If the humans living 40,000 years ago were just as intelligent as we are now, then why did it take humans at least over 30,000 years to organize societies like the Mesopotamian civilization where they used alphabet, built sophisticated buildings, roads and weaponry. It's kind of strange don't you think?

submitted by /u/paulruggiero
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Can an MRI cause problems with metal objects in someone's body if the object is not ferromagnetic (eg a copper/lead bullet, gold tooth, titanium implant)?

Posted: 14 Sep 2018 07:49 AM PDT

This comes from a recent askreddit question where we were wondering if an MRI could harm a patient who had an old bullet fragment still lodged in their body, but it kind of also applies to other non-magnetic objects.

I was wondering if you'd get induced current, and if those in turn could get you enough of a magnetic field to produce motion, kind of like you would see in a universal AC motor. I have no idea what sort of magnitudes are involved, though, so I don't know how significant the effect is.

submitted by /u/Wobbles42
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How fast do you have to travel around the equator to always be experiencing the same time of day?

Posted: 13 Sep 2018 09:52 PM PDT

How did Maxwell connect the link from 'Electromagnetic Waves' to 'Visible Light'?

Posted: 14 Sep 2018 07:28 AM PDT

It looked like Maxwell, after consolidating e-m theory into the Maxwell Equations and predicted the existence of electromagnetic waves made a blind leap to say "The speed of electromagnetic waves is close enough to the estimated speed of light, so obviously light is a electromagnetic wave."

I'm not sure if this was the right reasoning, but a quick wiki search shows,

In 1862-4 James Clerk Maxwell developed equations for the electromagnetic field which suggested that waves in the field would travel with a speed that was very close to the known speed of light. Maxwell therefore suggested that visible light (as well as invisible infrared and ultraviolet rays by inference) all consisted of propagating disturbances (or radiation) in the electromagnetic field.

This reasoning sounds a bit illogical and seems to be bordering on numerology. Following this line of reasoning it sounds like if an airplane was moving at 330 m/s, I would call that airplane sound, simply because it was moving as fast as sound.

There has to be something more about this than what Wikipedia lets on, right?

submitted by /u/kitizl
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Uluru is listed as the worlds largest rock. Is it truly an “individual stone” or is it attached to bed rock? How was it formed?

Posted: 13 Sep 2018 07:20 PM PDT

Why is the East Coast of the USA so hurricane prone? Is the region more active than other areas of the world?

Posted: 14 Sep 2018 07:12 AM PDT

Does high cortisol in the body, or a stronger than average cortisol response to external stressors, equate to a person being generally more stressed out? In other words, stress 'causes' cortisol, but does cortisol cause stress?

Posted: 13 Sep 2018 02:14 PM PDT

We know that external stressors and/or stress generally result in a statistically significant cortisol response. Has the opposite connection been shown to hold statistical significance? In other words, stress 'causes' cortisol, but does cortisol cause stress?

I'm asking this because I've come across studies in the past about this and general comparisons of stress in urban and rural populations. For example, I quickly found this study published in May of 2018 comparing rural and urban upbringings.

I'm not well-versed enough to know whether this or other studies on cortisol and cortisol responses directly claim or show that more cortisol equals more stress.

submitted by /u/lulzcakes
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[Telomere length and Longevity] Since our eggs and sperms create new full length Telomeres, why not our own?

Posted: 13 Sep 2018 04:31 PM PDT

  1. Nobel Prize Winner Elizabeth Blackburn found aging and telomere length are related with her group's research on Tetrahymena

  2. Babies have full length telomeres = We create new full length/longer telomeres in our sperms and eggs everyday/month (that goes wasted)

  3. High concentration of the telomere-repairing enzyme, telomerase, in the testicles is the reason for the full length/longer telomeres in our sperm

  4. Why not use this knowledge to come up with a way to biologically programme the rest of our cells in our body to do the same thing? (There are people who claim their products that can do that which are suspicious af and some that are going through gene therapy and waiting for the results that will take years. BUT I haven't seen anyone seeing the solution might be in our balls this whole time)

P.S. Not a science person(Wish I was, got a useless art degree instead) but got me extremely curious

submitted by /u/jinboliao
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How did the world function before bees joined the game? How and when did the environment become so depended on them?

Posted: 14 Sep 2018 05:59 AM PDT

Sorry if for whatever reason this question doesn't work. I (think I) know we need them for pollination, and from what understand there were different oxygen levels when the giant lizards were crawling around. After that it's all fuzzy, how'd we come to have our survival seem to depend on theirs? Or am I BEEing silly?

submitted by /u/CudaDisagrees
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Why is there a slight drop in the middle of high tide?

Posted: 13 Sep 2018 04:27 PM PDT

I collect data on water levels and every water sensor has a slight dip during high tide. What is the cause of this? Example: http://imgur.com/gallery/uFc7nwx

submitted by /u/notaputinhacker
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Do we currently have the ability to create pairs of entangled particles? Could we ever use this ability to create entangled pairs that exist here on earth and on the other side of the known universe? How stable would these pairs be? Could we ever use them to construct physical matter or objects?

Posted: 14 Sep 2018 05:45 AM PDT

What causes baked goods to go stale? Why can freezing stop this process?

Posted: 13 Sep 2018 04:31 PM PDT

Why has rocket power not been used on planes?

Posted: 14 Sep 2018 12:57 AM PDT

We have guided missiles which travel quickly and accurately... would need some course corrections for g reduction, but I don't see why it isn't feasible.

submitted by /u/JackhusChanhus
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Can brown dwarfs ever “re-form” into stars?

Posted: 13 Sep 2018 04:25 PM PDT

I've been reading about the interesting conspiracy on Nibiru, and the one argument many people make is that there is a "hidden sun" in the solar system called Nibiru, which is a brown dwarf. Now I'm aware that most pictures showing Nibiru are either just lens flares or some other explainable idea, because brown dwarfs don't emit light. But can brown dwarfs ever "re-form" into actual stars? Is there ever a period in time where the brown dwarf either forms into dust again and have a potential to become stars, for example? And if not, why? Mind you, I don't follow the Nibiru conspiracy, so I'm not looking to debate on it. I'd just like an answer to my question.

submitted by /u/VaultBoytheChosenOne
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