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Saturday, July 28, 2018

People subjected to high amounts of radiation tend to report seeing bright flashes of color, a pins and needles sensation, and a metallic taste. What does the radiation do to the body to cause these sensations?

People subjected to high amounts of radiation tend to report seeing bright flashes of color, a pins and needles sensation, and a metallic taste. What does the radiation do to the body to cause these sensations?


People subjected to high amounts of radiation tend to report seeing bright flashes of color, a pins and needles sensation, and a metallic taste. What does the radiation do to the body to cause these sensations?

Posted: 27 Jul 2018 05:20 PM PDT

If Astronauts were to be on the surface of the moon during a lunar eclipse, would the surface appear red to them?

Posted: 27 Jul 2018 07:09 PM PDT

Can a black hole consume another black hole?

Posted: 28 Jul 2018 02:05 AM PDT

Humans apparently share 50% of their DNA with bananas. We can all see the genetic differences but how do the similarities manifest themselves?

Posted: 28 Jul 2018 06:38 AM PDT

How can receipt paper be able to leave a "pencil like mark" when you score it with your nail?

Posted: 27 Jul 2018 08:11 PM PDT

Are certain people deep or light sleepers or is a person's sleep "depth" primarily dependent on conditions?

Posted: 28 Jul 2018 06:00 AM PDT

Solar sails and how they work?

Posted: 27 Jul 2018 11:10 PM PDT

When people talk about light there is spoken of a massless thing. ( as far i understand)

I know that light is a wave aswell as a partical

But when the talk about a solarsail they use light to (push) a spacecraft using light?

So then doesnt light need to have atleast some mass to (push) an object like a solarsail ?

Cause if there is no mass than how does the solar sail works?

Tried to look it up but could not find a decent anwser

EDIT: if asked before in this sub links are welcome

submitted by /u/lerwa0912
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Why doesn't carbon monoxide turn into carbon dioxide when additional oxygen becomes present?

Posted: 27 Jul 2018 09:59 PM PDT

Or does it? It seems to me that when CO comes out of the tailpipe of a car that it would immediately turn into CO2. If it doesn't do this, why? If it does, why does leaving a car running in your garage kill you so fast? Is it just using up all the oxygen faster than it can be replenished from outside the garage?

submitted by /u/hurraybies
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What's the period after which an solar or lunar eclipse of the same duration and size will re appair at a certain point i.e. particular latitude and longitude?

Posted: 28 Jul 2018 07:16 AM PDT

Lighting a lighter in pure oxygen?

Posted: 28 Jul 2018 03:08 AM PDT

In the murders of midsomer ep 4, the lions of Causton, at the very end there is a man in a hyperbaric chamber, you can see a monitor reading 100% oxygen. He takes out a lighter made out of metal and lights it while locked in the room. The room explodes, the explotion blasts through at least 2 doors, travels like 30 meters to blow up a bunch of windows and come out as a huge fireball. I do not think that is what would have happend at all. There was nothing near the lighter exept for his hand. Would it explode at all? If not what would happen? (sorry if my english is bad)

submitted by /u/science4you501
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Why is the pollen count higher in London than the North of England?

Posted: 28 Jul 2018 06:38 AM PDT

Why is the pollen count higher in London than elsewhere in the UK?

Is it due to more male (dioecious) trees planted in recent years in the city to absorb more pollution? Or why? Help as sister out please.

submitted by /u/The_greeen_faerie
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Are there any examples of a species which lives exclusively in the ocean, but is also capable of surviving in freshwater?

Posted: 27 Jul 2018 05:32 PM PDT

I know that things like pH and osmosis can really fuck things up for a saltwater-dwelling creature, but i'm just curious if there are any exceptions.

submitted by /u/dmfreelance
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How did astronomers know beforehand that the eclipse would be a blood moon?

Posted: 27 Jul 2018 10:12 PM PDT

How did man first learn to swim?

Posted: 27 Jul 2018 03:47 PM PDT

Why do quasars expell beams of energy from their poles?

Posted: 27 Jul 2018 10:00 AM PDT

Not really sure if its supposed to be a particle beam or electro magnetic energy beam, but still why does this occur?

If you have no dang idea on what I'm talking about, here is a pic: https://geek.hr/znanost/wp-content/uploads/sites/14/2014/06/09848848094.jpg

submitted by /u/Namejeff47
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Which factors cause hyperfocus or a state of flow (for example in Asperger syndrome)?

Posted: 28 Jul 2018 12:30 AM PDT

Which brain regions, neurotransmitters, and other factors induce a state of flow or hyperfocus?

submitted by /u/perpetualcuriousity0
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I don't even know where else to begin searching for an answer, so - what are these things?

Posted: 27 Jul 2018 01:40 PM PDT

Honestly, this question has ate away at me my entire life, but whenever I see one of these things, almost like a star-shaped spec of fluff, I can't help but wonder what they are.

Here's the image: https://imgur.com/a/W7c2aYr

submitted by /u/OnpaSutajio
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What causes jalapeño peppers to change color when pickled?

Posted: 27 Jul 2018 06:03 PM PDT

I recently started pickling hot peppers and last week this question came to mind. Is the vinegar in the brine affecting the pigment? What's going on at a molecular level?

submitted by /u/Liquid_kfc
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Does food spinning in the microwave actually make a difference in the way it is heated?

Posted: 27 Jul 2018 11:43 AM PDT

I remember when I was younger, microwaves didn't have spinning plates. Now they all do. Does it make a difference?

submitted by /u/tambobam
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Are the quarks in a Proton in a constant superposition of the 8 color-charge states or do they have definite colors?

Posted: 27 Jul 2018 08:26 AM PDT

Since (to my knowledge), there are 8 color states that any given quark can be in, are these states ever fixed in place, or rather, definitive, or is each of the three quarks making up any given proton always in a superposition of these color-states due to interactions with the gluon field?

Assuming they are always in superposition, is there any way we could destroy that coherence to create a definite triplet of color-states, and if so, would any specific configuration cause observable differences in that proton's outward behaviour? i.e. Would protons compromised of quarks which differed only in color act the same?

submitted by /u/50millionfeetofearth
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Is there a simple explanation for why autorotation occurs?

Posted: 27 Jul 2018 06:28 AM PDT

I don't really understand how autorotation can create lift by seemingly spinning the rotor. I understand air goes up through the rotor, but why does it make the rotor spin and how does it generate lift without forward propulsion? Thank you!

submitted by /u/Loyal-Citizen
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Is it possible for mosquitos or flies to get concussion?

Posted: 27 Jul 2018 02:15 AM PDT

If we hit them and they hit the wall very hard, would they get brain* concussion?

submitted by /u/Frajdej9x0
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Can you count algae in a non-pure culture with a hemocytometer?

Posted: 27 Jul 2018 07:34 AM PDT

I would like to get a quantitative count of algae in an IBC tote full of nutrient rich water(used for hydroponics).

We've noticed biofilm in the tank and would like to get a baseline algal count before we start treating it. I've used a hemocytometer to count algae before but only in pure cultures. I was just wondering if it would work in a non-pure culture.

Thanks!

submitted by /u/KingTimbers
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Friday, July 27, 2018

There's evidence that life emerged and evolved from the water onto land, but is there any evidence of evolution happening from land back to water?

There's evidence that life emerged and evolved from the water onto land, but is there any evidence of evolution happening from land back to water?


There's evidence that life emerged and evolved from the water onto land, but is there any evidence of evolution happening from land back to water?

Posted: 27 Jul 2018 01:29 AM PDT

How far can electricity arc reach?

Posted: 27 Jul 2018 05:00 AM PDT

Does electricity's ability to arc depend more on voltage or amperage? Is there a more-or-less-correct formula to calculate how far it could arc in regular room conditions(let's say 21 degrees Celsius and 50% humidity in a regular town urban environment)?

How does conductivity of a material affect the arcing and its distance?

submitted by /u/Kezeal
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Why do the water droplets that make up clouds, bunch together into clouds instead of being evenly distributed in the air?

Posted: 26 Jul 2018 01:35 PM PDT

How can a relatively small river like the Virgin River cut a 2000 foot deep Canyon (Zion) while an enormous river like the Mississippi doesn't cut a canyon at all?

Posted: 26 Jul 2018 01:40 PM PDT

What’s the difference between a food allergy and a food sensitivity?

Posted: 26 Jul 2018 04:49 PM PDT

What is the difference between [C I], [C II] and C ?

Posted: 27 Jul 2018 03:02 AM PDT

How does sunscreen work?

Posted: 27 Jul 2018 02:03 AM PDT

How can we measure redshift and light from astronomical objects accurately? It seems like the atmosphere of earth or other gases in space might interfere with the light that is coming in.

Posted: 26 Jul 2018 06:29 PM PDT

How can we possibly measure redshift from other galaxies accurately? Especially when using something like a very large telescope on earth? How is the data coming in not tainted?

submitted by /u/braininabox
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How do these geared secateurs work?

Posted: 27 Jul 2018 01:49 AM PDT

I have these geared secateurs, and they have a gearing mechanism which I don't understand. I expected the gears to move as the handles are squeezed, but they do not move at all (they appear to be fixed to the top/thumb handle). Are the gears affecting the power of the shearing motion, and if so how? Pic of the secateurs in question

(It is possible they are not functioning correctly, but this seems to be a popular design, so I don't think this is the case.)

Thanks!

submitted by /u/balanced_view
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Do insects sleep? If so, do they sleep for similar reasons as humans?

Posted: 26 Jul 2018 11:42 AM PDT

What exactly causes spaceships to burn in the Earth's atmosphere during reentry?

Posted: 26 Jul 2018 03:13 PM PDT

What are elliptic curves and how do they relate to cryptography?

Posted: 26 Jul 2018 07:38 AM PDT

How many devices can I plug into an outlet?

Posted: 26 Jul 2018 02:55 PM PDT

Assuming I have a power strip to extend the amount of connections to as many devices as I want, and this is a standard US style outlet. I understand different devices would draw variable amounts of power, so I'll settle for all of them being the same thing (eg; 15 PS3's)

submitted by /u/Foreskin_Paladin
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How did Nasa to reactivate Pioneer 6 ?

Posted: 27 Jul 2018 05:13 AM PDT

Does salt water sting sea animals when they have wounds like it does with humans?

Posted: 26 Jul 2018 09:00 AM PDT

Russian scientists claim frozen 42,000 year old worm came back to life. How likely is this to be true?

Posted: 26 Jul 2018 11:26 AM PDT

I didn't immediately see a peer reviewed article and the "involvement" of Princeton rather than co-sponsor makes me a little suspicious. What say you scientists?

Siberian Times article

submitted by /u/SoFlo1
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Would you feel the acceleration if you were in a spaceship using a gravity assist to accelerate?

Posted: 26 Jul 2018 08:04 AM PDT

If you spaceship was at a constant velocity and passed near enough to Saturn, for example, to perform a gravity assist, would you feel the acceleration g's? Assuming you didn't use your engines.

Edit: Thanks for settling what was quickly becoming a shit-storm over in /r/asksciencefiction: https://redd.it/922c4m

submitted by /u/zheadings
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What is all of this “antibacterial coating” stuff, and does it work?

Posted: 26 Jul 2018 12:27 PM PDT

Do animals have food that they prefer?Do their tastebuds work the same way ours do?

Posted: 26 Jul 2018 08:09 AM PDT

My dog eats pretty much anything so we have to be careful with him around, because if something falls on the floor he will eat it. I was just curious if there were foods that would be his "favorite."

submitted by /u/Json-TheRandom11
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If heat rises, why does it get colder as you go higher into the atmosphere?

Posted: 26 Jul 2018 08:52 AM PDT

Can the moon tint slightly red in the days around a lunar eclipse ?

Posted: 26 Jul 2018 09:13 AM PDT

Since a few days, I noticed that the moon has had an unusual red tint.

It surprises me that this happens so close to the lunar eclipse of tomorrow : is the moon partially lit by rays that passed through earth's atmosphere in the days around a lunar eclipse ?

submitted by /u/adtrevor
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Thursday, July 26, 2018

Megathread: buried lake detected near Mars's south pole

Megathread: buried lake detected near Mars's south pole


Megathread: buried lake detected near Mars's south pole

Posted: 25 Jul 2018 11:35 AM PDT

Radar data from the European Space Agency's Mars Express spacecraft have revealed that a buried lake of liquid water could exist near the south pole of Mars. This lake would be around 20 km wide and 1.5 km under the surface. This discovery has been announced today by a cooperation of Italian researchers from various universities and laboratoires.

The history of water on Mars is complex but this could be the first evidence of liquid water still existing on the red planet. Several of our planetary science panelists will be in the comments to help answer questions you may have on this announcement.

More information on the topic:

submitted by /u/AskScienceModerator
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AskScience AMA Series: We have made the first successful test of Einstein's General Relativity near a supermassive black hole. AUA!

Posted: 26 Jul 2018 05:00 AM PDT

We are an international team led by the Max Planck Institute for extraterrestrial physics (MPE) in Garching, Germany, in conjunction with collaborators around the world, at the Paris Observatory-PSL, the Universite Grenoble Alpes, CNRS, the Max Planck Institute for Astronomy, the University of Cologne, the Portuguese CENTRA - Centro de Astrofisica e Gravitacao and ESO.

Our observations are the culmination of a 26-year series of ever-more-precise observations of the centre of the Milky Way using ESO instruments. The observations have for the first time revealed the effects predicted by Einstein's general relativity on the motion of a star passing through the extreme gravitational field near the supermassive black hole in the centre of the Milky Way. You can read more details about the discovery here: ESO Science Release

Several of the astronomers on the team will be available starting 18:30 CEST (12:30 ET, 17:30 UT). We will use the ESO account* to answer your questions. Ask Us Anything!

*ESO facilitates this session, but the answers provided during this session are the responsibility of the scientists.

submitted by /u/AskScienceModerator
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My mum had the question "Why don't the atoms of a liquid fall through the gaps between the atoms of the containers?"

Posted: 26 Jul 2018 07:30 AM PDT

If we say sharks as a species are roughly 400M yrs old, does this mean that sharks from back then could theoretically interbreed with today’s sharks?

Posted: 26 Jul 2018 12:18 AM PDT

If an astronaut "fell" from the ISS into space, at which speed would he go? And what could be his maximum speed?

Posted: 25 Jul 2018 11:32 PM PDT

Sorry if it isn't really clear, English isn't my primary language.

submitted by /u/Pinokus
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Do scientists and psychiatrists still agree that the right hemisphere of the brain is emotional and the left hemisphere is logical, or has this idea been debunked by recent research?

Posted: 25 Jul 2018 09:41 PM PDT

What gemstones probably exist on other planets (and our moon) in the solar system?

Posted: 25 Jul 2018 09:26 AM PDT

Are the ecosystems of areas with religion that enforce vegetarianism, like Jainism, different?

Posted: 26 Jul 2018 03:27 AM PDT

What can they tell us about how the Earth will look like in our probable vegetarian future?

submitted by /u/gallifreyan_pleb
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Is there a connection between "gut health" and anxiety/depression?

Posted: 25 Jul 2018 07:33 PM PDT

I see the claim made by various MLM products that improving your gut health can help anxiety and depression. Putting aside the MLM supplements themselves (which I think are overhyped and of little use), has a meaningful correlation been found?

submitted by /u/adroitmonkeyhands
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Since glass doesn't oxidize like metal, why don't two pieces of very clean glass cold weld when pushed together?

Posted: 25 Jul 2018 08:40 PM PDT

Do multilingual people have a slightly different personality associated with every language they speak?

Posted: 25 Jul 2018 06:20 PM PDT

Would an Anti Neutron and a Neutron annihilate?

Posted: 25 Jul 2018 05:24 PM PDT

And if they did, would there be any attraction between the two like there is between a positron and an electron?

submitted by /u/xShadey
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How are mice bred to model specific human pathophysiologies?

Posted: 25 Jul 2018 01:57 PM PDT

Do the signals of multiple cones/rodes share the same pathway in the optic nerve?

Posted: 26 Jul 2018 12:18 AM PDT

My question was formed when looking into this picture.

The rightmost ganglion receives signals from 3 rods and a cone. Which would means the fiber starting from that ganglion would signal "on" on a mix of the cone's and the rods' signals.

This is not necessarily bad but it does change how "post-processing" in the brain would have to work. There is a difference between having ~1million signals of one of the cell types (L, M, S, R) and having to deal with signals that are a combination of those.

Just curious, does that kind of "promiscuity" of ganglion and/or bipolar cells actually exist? or was it just an oversight by the artist?

P.S. looking at numbers of cells alone there needs to multiple photosensitive cells connected to the same fiber since there are ~6 times more photosensitive cells than fibers. So the question is specifically about "cross-signals". Having 6 L cones connected to the same ganglion is a given, can we have a ganglion connected to 2 L, 2 M and 2 S cones? it seems to be inefficient from a "data processing" viewpoint, but the lower cost in "infrastructure" (the amount and organization of bipolar cells) might offset this.

submitted by /u/hidetzugu
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Is everyone connected with everyone else on Facebook?

Posted: 25 Jul 2018 10:34 AM PDT

Could I connect through some number of friendship to anyone in the network or is it more fragmented than I imagine?

submitted by /u/lurker-4-life
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Are there any contagious diseases that target gut bacteria specifically?

Posted: 25 Jul 2018 10:33 PM PDT

Is there any one object in space (not counting structures like Nebulas and Galaxies) that has a diameter of at least 1 lightyear?

Posted: 25 Jul 2018 05:21 PM PDT

Any monstrous black holes out there that have event horizons that big?

submitted by /u/Soralink411
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Other than regulating pH (and providing a medium) what are the roles of buffers in gel electrophoresis?

Posted: 25 Jul 2018 09:05 PM PDT

I've read that buffers are needed to generate an electric field such that the SDS-treated protein, or DNA, can move towards the cationic electrode. This seems strange, and I'd like to understand it better. Wouldn't the electrostatics between the cationic electrode and the DNA or protein be enough to pull the desired molecules through the gel? I understand that this isn't the case, but don't understand why.

Thanks so much for your time and help!

submitted by /u/RadiantStars
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There's steel reinforced concrete and there are metal foams. Are there metal foam concrete composites?

Posted: 25 Jul 2018 05:16 PM PDT

How are conjugated diene p orbital lobes in multiple orientations at once (in accounting for their 4 MOs) if their pi bonds don’t have free rotation?

Posted: 25 Jul 2018 12:45 PM PDT

I'm not sure if I'm just misunderstanding their representation on the diagram but I figured it'd be best to ask.

Conjugated Diene MO Diagram

submitted by /u/hollowlights
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Does global warming on Earth affect the solar system at all?

Posted: 25 Jul 2018 10:03 AM PDT

How can entropy increase? / help me understand entropy

Posted: 25 Jul 2018 05:15 PM PDT

i've heard several definitions of entropy, but the first to make sense is wikipedias; entropy is a number that is derived from the number of microstates of a system with some math applied. if i understand what a microstate is, it's just a possible configuration, like a 10x10 grid with an object on 1,1, another microstate could be the object on 4,9.

given a finite system, how could the number of possible configurations ever increase let alone decrease? wouldn't it just be constant? the only way i see to change entropy is to change the scope of the system; if the grid shrinks to 9x9, the entropy drops from 100(+-math) to 81(+-math), conversely, if you increase the grid to 11x11, you get more possible configurations.

how does that work for the universe though? how can the total universal entropy increase if the number of things in hte universe is finite?

A fair bit of this is probably off. i've only ever seen entropy as a chart to memorize for chemistry, but i want to understand it. if that's too broad of a request i'd be happy with links to videos or articles that explain it

submitted by /u/potatotate_spudlord
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