Why do sunburns start to hurt after you get out of the sun? Why don’t we notice the pain while we are in the sunlight? | AskScience Blog

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Thursday, July 12, 2018

Why do sunburns start to hurt after you get out of the sun? Why don’t we notice the pain while we are in the sunlight?

Why do sunburns start to hurt after you get out of the sun? Why don’t we notice the pain while we are in the sunlight?


Why do sunburns start to hurt after you get out of the sun? Why don’t we notice the pain while we are in the sunlight?

Posted: 12 Jul 2018 02:15 AM PDT

Are there any long-term effects for people who have been in a prolonged coma as a child?

Posted: 12 Jul 2018 05:59 AM PDT

Since coma messes with your internal clock, does this lead to any abnormal physical and mental development patterns? E.g., do they have longer spines than normal people?

submitted by /u/Pacific_Rimming
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Why do the boys rescued from the cave in Thailand need to be quarantined?

Posted: 11 Jul 2018 09:04 AM PDT

What would make them any more susceptible to catching something if exposed to other people, than they were 14 days ago? Just the limited food and rest in the cave?

submitted by /u/ECatPlay
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Megathread: Multi-Messenger High-Energy Neutrino Observations

Posted: 12 Jul 2018 08:20 AM PDT

Currently there is a press conference where a high-energy neutrino (~290 TeV) has been detected with IceCube which is coincident with an active galactic nuclei pointed directly at us, TXS 0506+056, approximately four billion lightyears away. Finding the origins of neutrinos has been an ongoing problem though they have been observed from the Sun and from Supernova 1987A. This is a big advancement for multi-messenger astronomy, using electromagnetic waves and neutrinos in a way similar to using electromagnetic waves and gravitational waves to get a new view on the universe. If you have questions, ask them here!

submitted by /u/AskScienceModerator
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How do pockets of breathable air form in deep underwater caves?

Posted: 11 Jul 2018 05:25 PM PDT

I was reading an article on BBC News about a diver who got lost and only survived because of an underground pocket of breathable air. How did the air get there in the first place? Is it just really, really old? Will the oxygen ever get replenished or is it mostly unusable now?

submitted by /u/neko819
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How does electricity know what the shortest path is to its destination?

Posted: 12 Jul 2018 12:54 AM PDT

Not sure if it belongs to this tag, or another one but this one started bugging me as soon as I thought of it.

I assume it works by distributing a small amount of charge in all directions and then moves to the point where the electricity has not bounced back yet, but then again, that's just my assumption and is most likely completely wrong.

submitted by /u/puppy0cam
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Research has been done on the effect of gut microbiome on behaviour. Has any research been done on the effects of sharing elements of one's microbiome with a partner, through things like kissing and oral sex, might have on behaviour within the relationship? [medicine] [human body]

Posted: 12 Jul 2018 02:28 AM PDT

See title

submitted by /u/theRailisGone
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What changes nutritionally in fruits in vegetables when blended instead of eaten raw?

Posted: 12 Jul 2018 05:36 AM PDT

What changes nutritionally to certain food groups when they are blended instead of eaten raw? For example, I occasionally make smoothies (not juicing) with things like mixed berries, spinach, banana, avocado, tomato. How does the body process these types of foods differently when consumed this way, as opposed to if eaten raw? Does one way tend to be more beneficial to bodily regulatory processes?

submitted by /u/RealKeanuReeves
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Imperial or metric for small measurements in the US?

Posted: 12 Jul 2018 05:19 AM PDT

I was wondering whether in the US do they use the imperial system even for smaller measurements such as screws, pipes, holes etc that are less than 5mm in diameter? I saw that there are points and pica but I've never heard that those measurements are widely used in an industrial setting.

submitted by /u/hamuketsu
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In what way does AIDS effect the body if it were to go untreated?

Posted: 12 Jul 2018 02:50 AM PDT

Do we know the physical properties of TRAPPIST-1 and it's planets yet? How do we get this data on planets so far from us?

Posted: 12 Jul 2018 07:47 AM PDT

If we do have this data, where would it be found? If we don't, what's preventing us from getting it? Is it just the distance or anything else? Do we have that kind of data on any other planetary system yet? (apart from our own, obviously)

submitted by /u/Aurimus_
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Are time and space the same thing? If not, how are they related?

Posted: 12 Jul 2018 07:29 AM PDT

I hear about spacetime a lot and the idea about space and time being conjoined that way seems really odd and doesn't really make sense to me.

submitted by /u/PercyOzymandias
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Do fireworks have a significant effect on air pollution?

Posted: 11 Jul 2018 04:14 PM PDT

Is the Circadian rhythm of a person above the arctic circle different from the rest of us?

Posted: 11 Jul 2018 03:52 PM PDT

We all have the circadian rhythm, about 25 hours with an arguably biphasic pattern, but I read something about deep sea creatures/cave creatures lacking a circadian rhythm because they aren't exposed to the sunrise/sunset pattern. So is the circadian rhythm for people living above the arcticel circle different, since half the year they half almost constant sunshine and half the year almost constant night?

submitted by /u/shotgunsforhands
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Is the circadian rhythm of blind people different from non-blind people?

Posted: 12 Jul 2018 02:56 AM PDT

I saw a good thread about blind Mexican cave fish and how they don't experience the day night cycle, and therefore have a different rhythm to their land counterparts. When I shared this with my wife asked me what about blind people, as they don't experience the day night cycle the same as their non-blind counterparts?

submitted by /u/CalmedFury
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Can radio waves from radio stations flip spin of protons in our body?

Posted: 11 Jul 2018 11:00 PM PDT

In NMR and MRI radio waves are used to flip the spin of protons the human body. Do radio waves from radio stations do this as well, and could there be any consequences from doing this?

submitted by /u/lit_R
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How does gravity affect molecular or smaller scale processes?

Posted: 11 Jul 2018 10:54 PM PDT

Are pollution masks proven to be effective against polycyclic aromatic hydrocarbons?

Posted: 11 Jul 2018 10:30 PM PDT

Is there any study assessing the benefit of wearing a pollution mask when walking/biking in a city full of cars?

submitted by /u/sirnicolaz
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Do new tectonic plates ever form/merge with other ones?

Posted: 11 Jul 2018 09:18 PM PDT

If so how often does this happen? If not does that mean we'll always have the current plates we have now in some arrangement?

submitted by /u/SpinnerMask
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How many nukes would it take to cause a nuclear winter?

Posted: 11 Jul 2018 06:59 AM PDT

I'm confused about nuclear weapons. A Ted talk I watched, along with several other sources, all say "a hundred or so nukes will be enough to cause a nuclear winter and wipeout humanity". But, according to google, there have been over 1000 nuclear detonations. Why such a discrepancy between these numbers?

submitted by /u/Negative_Splace
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Why is WR104 so dangerous?

Posted: 11 Jul 2018 11:07 AM PDT

I've always wondered, even though the gamma ray burst isn't directly pointed at earth why is there still risk?

submitted by /u/AnPurpleCow
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Do supergiant stars generate more energy in their death than they do in their life?

Posted: 11 Jul 2018 09:03 AM PDT

I'm really interested in stars for no particular reason. Earlier today, I had heard a physicist say making a stable wormhole would require amounts of energy equivalent to creating a black hole out of a star—a supernova. Idk if they're right, and the validity of the statement isn't the focus, really. I'm more curious about whether or not the energy output of a supernova exceeds that of the energy output of a star during the rest of its life. Is there even a way to measure that?

submitted by /u/Boomsta22
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How often do our planetary neighbors near us in orbit?

Posted: 11 Jul 2018 12:32 PM PDT

Every night for two weeks I have seen Mars, Jupiter, and Saturn. Right when the sun sets I can usually see Venus too. All at the same time in the same sky.

How often does this happen? Does the amount of visible planets per night change throughout the year? Or does it only change year to year?

I feel really lucky to have this Truly Awesome view of our solar system every night!

Edit: I understand how each planets orbit works. Also that earths orbit plays a heavy hand in this too. I guess this question is more of an r/theydidthemath post, because you would have to calculate all of these together to realize how many are visible through the year, every year.

submitted by /u/drewthepooh72
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