The Horrors of UV radiation

[@darkscienceyt]

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[@Jan12700]

Scam

[@gipugly]

no

[@soundspark]

@@Jan12700 Like 90% of KZbin sponsors.

[@BleepBlop-rh9lm]

no

[@NuanceOverDogma]

you are a phony

[@markedis5902]

I was a 1980s goth. I’ve been avoiding sunlight for 40 years.

[@hermask815]

can i see your veins through your translucent skin? i'm asking for a friend. (he's a vampire)

[@TotalDec]

"Goth" is a 90's word, so...

[@thedemotivationalspeaker3090]

In the 1980's you either avoid the sun entirely or fry their skin as much as possible lol

[@r.guerreiro140]

Comparing to other people of your cronage, can you notice differences about your skin?

[@lajoswinkler]

@@TotalDec LOL no.

[@OhTaKuSo]

Never understood why people want to use tanning beds, I will never lay down in the cancer bed

[@babycarrotz32]

On this night, I pray to the Engagement God of KZbin by leaving a comment and bumping your Engagement. All seriousness though, great video. I appreciate the story, and warnings against UV Exposure.

[@Korvi-Kun]

Yeah, those tanning beds are really dangerous since the people who use them go there multiple times. Going Once may be fine, but getting ur skin from white to brow/black is just stupid and dangerous.

[@loganwolv3393]

I'll take the vitamin D synthesis and nitric oxide synthesis tho.

[@HELLF1RE9]

Probably because they want to get tanned Sherlock

[@Kwauhn.]

@@HELLF1RE9 I love it when people think they're pointing out something everyone else failed to understand. You're behind the curve, but the spirit's there 😂

[@LinkinPark4Ever1996]

As an introvert staying inside a lot, I see this as an absolute win

[@marcse7en]

Me too! 👍🤣

[@PissBaby-o8f]

Go outside mane life is too short to spend it inside on the computer

[@Wulfjager]

gotta get those cancer numbers up with packaged/processed food for your cancermaxxing journey

[@FarewellOrwell]

Incel

[@evanbrown7325]

That also has it's own set of risks.

[@theromanian8194]

Five months ago, a medical university in Romania accidentally left an UV lamp on for an entire day while students were studying. Around 20 students later arrived at the hospital with retinal burns and skin injuries. Some have permanent damage, some are blind. Due to corruption in the country, no one has been held accountable.

[@ΠάνοςΒασιλειάδης-ω7φ]

A yes, "justice" in eastern europe 👉 🤡🤡🤡

[@faithesprit81]

This is insane

[@peterwhite8424]

Why is there so much corruption in Romania. Are Romanian people more corrupt in average 🤔

[@jpsmith8488]

Perhaps, but what is the source of this allegation? - I may have overlooked something but using a Google search I was not able to find any other reports of this incident. I may have overlooked a report because of a language barrier, but without some corroboration this comment is otherwise indistinguishable from an urban legend.

[@theromanian8194]

@jpsmith8488 Search for UMF Craiova

[@HenrikMyrhaug]

Thank god, someone finally actually gave a proper explanation of how UV is damaging despite not being ionizing. Thank you so much, this was really informative, and scratched an itch I've had for years now!

[@darkscienceyt]

Thanks!

[@tetrabromobisphenol]

UV, and even visible light, is ionizing(!!!) The reduction potential to dissociate water is 1.6 eV, corresponding to a wavelength of 775 nm which is at the edge of Near IR. Thymine dimers just happen to be alot more effective at mutation than free radicals in a cell because said free radicals are rapidly quenched by superxode dismutase, peroxide dismutase, etc, whereas thymine dimers are a direct action on the DNA.

[@amosbackstrom5366]

​@@tetrabromobisphenolDo you have a reference for that actually working? I'm sure the dissociation energy corresponds to that wavelength but that doesn't mean it will dissociate the water. Chemistry and physics is a lot more than just thermodynamics. Also the label "ionizing radiation" is a bit misleading, there's plenty of unstable compounds that can react with "non ionizing" or visible light.

[@Shaker626]

Doesn't help that some UV wavelengths are just soft x-rays.

[@jonkaminsky8382]

I thank God for wonderful people like you who leave positive feedback that resonates perfectly with the way I feel about the channel content. Thank you!

[@NighttimeNubbs]

Sitting under a UV light for warmth gives 2001 Lia radiological accident vibes. Three men looking for firewood in snow covered forest in Georgia stumble across 2 metal canister radiating heat. They proceeded to use them as a heat source and getting radiation poisoning because they were radioisotope thermoelectric generator. Pretty brutal story with me hearing about it from Kyle Hill and Plainly Difficult

[@darkscienceyt]

that’s fascinating and horrifying!

[@maalikserebryakov]

Poor dudes :(

[@Pavol-Pivka]

Yeah. I know the accident. The poor guys must stayed at hospital for 2 years to heal their wounds. One of them never get back home. As fas as the heater there was about 1 minute shifts for workers who get it out of forest. Another 300 heaters were later found all over Georgia !!

[@veccio]

That almost sounds impossible after the Goiana tragedy in the 80s. I figured they would keep close track of any nuclear material. Edit: ah, *that* Georgia. This was a great video, nicely written with just the perfect amount of prerequisite information. However, I feel like that security guard was failed, even despite is ineptitude. At one time, companies would have proper training and a guard would be part of staff, and not some kind of contractor unknown to the rest of a lab. They might even have proper training and healthcare afterward.

[@coryingman]

@@veccio The more I look for signs of it, the more I see that working people everywhere are being abused in this system.

[@probablyaxenomorph5375]

This further enforces my belief that security guards need to be educated in the nature of whatever they're guarding, especially in scientific facilities.

[@markedis5902]

Looking forward to “The Dark Science of Wave Particle Duality”

[@MahadDProeditz]

Lol

[@thurbine2411]

Dark science of thermodynamics😱

[@unknownman5090]

@@thurbine2411 The horror of not being able to harnest infinite energy

[@ganweidi1382]

How to skin the schrodinger cat

[@seanmcmanus9656]

​@@thurbine2411maxwells demon will kill you eventually, if you live forever, and the probabilistic outcome that is most unlikely happens 😂

[@AttilaDaHunk]

You should always consider getting any weird moles checked. Melanoma is a very curable cancer if you catch it early. Though it is rare you should still keep a bit of an eye out for any weird looking lesions on your skin.

[@M-Soares]

This. Some signs that a mole might be melanoma are if it's assymetric, unusually shaped or if it growing.

[@Sorrento_Ben]

Skin cancer (aside from just Melanoma) is the most common cancer in the US and melanoma causes the majority of deaths…mainly because it’s so often overlooked. Quite literally seen and disregarded as a mole, Get that stuff checked out!!

[@lateralrook]

What if you have a "mole" in the white part of your eye

[@Mediamarked]

@@lateralrook They aren't supposed to be there, so see a doctor, a.s.a.p?

[@Petra44YT]

Yes, and you should ESPECIALLY do that if you had made it your habit to doze unter a UV light for months.

[@masterdef2209]

That is horrifying to think about. Taking a short nap in a warm room turning into getting cancer.

[@oldmech619]

There needed to be an interlock switch system. Also a bright red flashing warning light. Seriously. This should have been the Safety Officers responsibility in the first place.

[@abc-ze5tm]

He did it for several weeks though smh

[@Pushing_Pixels]

They fired him purely because they didn’t want to pay for his inevitable cancer treatment or provide his family any compensation. He wasn’t trained properly or warned of the dangers, meaning the employer was at fault. He could’ve sued them, so I’m sure they failed to mention the likely outcome of all that exposure before they quickly shoved him out the door. File under: psychopathic management stories.

[@oldmech619]

@@Pushing_Pixels . That room and UV lighting had no warning or safety interlocks. Owner/operator are absolutely guilty of safety dereliction.

[@Irilia_neko]

Imagine being stupid enough, to not read the warning, and stay in a place where you have a light of a strange color that produces heat 🤔

[@Abderahmane_iba]

Ow maaaan, so you are telling me I won't gain any superpowers?

[@darkscienceyt]

Your super power will be to grow cells at an uncontrolled rate

[@Owlzz_]

​@@darkscienceyt xD

[@beastabuelos6421]

@@darkscienceyt cell man

[@stricttranslator7871]

😂😂😂​@@darkscienceyt

[@Aids902]

What happened to your last video on posturing?

[@Morlev44]

Damn they really did that guard dirty. It's not like he knew or did it on purpose but better to cut all ties asap than to later be forced to pay settlements.

[@shinola228]

He broke rules and disregarded a warning sign.

[@darkscienceyt]

yep, this is what I was told

[@tetrabromobisphenol]

@@shinola228 The institute also broke the rules because such a system is inherently unsafe without interlocks and keyed switches and proper training was not carried out. Any VALID training program requires testing to ensure that the employee understood all of the material. If an HVAC tech were to go in there to fix something and accidentally turn on the UV source he could have gone blind or gotten cancer too. It's incredibly stupid and unethical to put all of the blame on the guard. The family of the guard would have an easy time in court suing over this, the institute was highly negligent.

[@IARRCSim]

Sleeping on the job alone is likely enough reason to fire a security guard, though. Giving himself a lethal dose of radiation over several weeks of sleeping on the job routinely was icing on the cake.

[@midneis]

Yeah, they could've explained the dangers to him at least. Melanoma is treatable if caught early. I wonder if he'd still be alive if they had told him to look out for it in the coming months/years.

[@_rnzr]

my brain is so cronically broken that when i saw the electron move i unironically though "hehe, radiation makes electron angry"

[@jimobyobiwan9005]

such a great comment

[@Wyi-the-rogue]

No no ur brain is perfect

[@cameronbigley7483]

It's that modern day humor, and I love it. I'll have to explain heat to people like that lol

[@amosbackstrom5366]

Me thinks happy not angry but either way

[@andreahighsides7756]

This is so adorable

[@internetw4nk3r74]

So you mean a company fired a low rank worker for failing to comply with the safety protocol, unbeknownst to him, fully realizing he will contract health problems in near future? I say, that company is more dangerous than "mere" uv light

[@iGame3D]

The writing was literally on the wall. He walked that hall how many times before he baked himself dead?

[@Dudeguymansir]

“You’re fired before you hit the ground. Less paperwork that way.”

[@Lichnaya_pravda]

I am a welder, UV is always a risk. Most other welders are too careless

[@adamwyman4629]

Co-worker of mine said arc eye feels like getting sand in your eye, but it doesnt go away.

[@Taldaran]

​@@adamwyman4629arc flash eye does go away after a few days, but in the interim your eyes itch horribly and water, you can't keep your eyes closed for very long or open for very long due to the discomfort, a doctor may prescribe you numbing eye drops so you can sleep, and for a few days the cornea of your eyes will be bright red, and you will be temporarily photophobic, so you will have to wear sunglasses because you will not be able to tolerate bright light. I had it happen to me and it's definitely no picnic.

[@Alva46XOXO]

Welder here, metal dhavings, 11,000 RPM rotating wheels and 100 amps of electricity don't scare me, but a small hole in my welding hood? That's horrifying.

[@154charlie]

Yep, I'm also a welder. I never work without sleeves even if I'm sweating buckets in a hot shop. I wish I could make some other coworkers care more, most do, but there's a few that just don't give a damn... I really hope nothing bad happens to em.

[@klondike3112]

I clicked on this video because I'm a welder. I always wear a leather jacket and flannel underneath :)

[@Stop.Arguing]

I thought this channel was called "Dark" science haha!! UV got to be kidding me!!! great work as always :)

[@Neoln]

Ba dum tss

[@Daimo83]

"He's exposed himself to lethal radiation! Quick, fire him for sleeping on the job!"

[@AxionSmurf]

Only WE can expose you to lethal radiation, serf!

[@jeremy5602]

What else were they supposed to do? Keep a lazy security guard that sleeps on the job and completely ignores giant warning signs saying not to expose yourself to the UV lamp inside the room? He was unfit for the job and would have been fired whether a UV light was involved or not.

[@ExponentMars]

@@jeremy5602 fire him, but definitely tell him about his now-increased risk of skin cancer so that he goes and seeks treatments. They probably didn't tell him about it so that they wouldn't be responsible for his treatment.

[@violetLizard]

I thought the "naps between rounds" meant that he's not currently working. Given there's no picture of the warning, I think it's unfair to assume it was obvious.

[@kamakaziozzie3038]

@@jeremy5602yes. I’m also confident that’s what the cancer dude employers were thinking. 😂 Not that they would soon have a deathly ill employee to drain their company health insurance benefits

[@rtqii]

Back during the WOD, when Psilocybe Fanaticus used to advertise in High Times, he fruited a batch of mushrooms under UV light and damaged the genome that developed from the spores he harvested. Even generations later, albino mushrooms and mutants would develop from spores harvested from line that were fruited under UV light. He had to go back to his collection and start a new line that had never been exposed to UV in order to restabilize the genetics.

[@H33t3Speaks]

Pretty dubious claim but fungus is pretty cool.

[@AxionSmurf]

Did he write a trip report on erowid too

[@f.demascio1857]

I remember that. I had begun using a black light during fruiting after he recommended it. It took many batches to realize what was happening.

[@iGame3D]

Fascinating.

[@Digitalsurfer265]

“Decades of poor diet” Side eyes the ice cream sandwich in hand👀

[@billynomates920]

🍺 for me🍻

[@cbreezy]

Eat it you fking coward

[@hungryavacadoo]

🧑🏿 for me

[@thecoolguy3498]

@@billynomates920get help

[@zane003]

But we need it for vit D production, and to avoid depression. Also human eye can see UV light (as faint blue-looking color), but most of it doesn't make it through the eye lens. just like everything else we deal with, you shouldn't over do it either way (100% avoiding it, or over exposure).

[@andreea-mgh]

It takes a minuscule amount of sun exposure during summer to get enough vit D. For example in the UK (which has WAY less sun exposure than southern USA or southern Europe, for example) it's enough to spend 13 mins outside at noon 3 times a week to get enough, assuming you don't also get vit D from your diet in which case you need even less. If you go overboard you increase your risk of negative side effects. It's always cheaper and less risky to pay for vit D supplements than for cancer treatment. Not to mention the Ozone layer that limited the amount of UV reaching the Earth's surface is getting thinner every year. Also that thing about most UV light not going through the eye lens is straight up misinformation. It's a clear transparent lens, it doesn't have any kind of barrier. Just because you can't see it doesn't mean it won't reach into your eyes and damage the optic nerve. Of course, you shouldn't avoid the sun at all times, but since people are in heavy denial that the ozone barrier has degraded and the sun is no longer as safe as it was 80 years ago, we should always be mindful of how much sun reaches our body. Check UV index when you go outside, at least.

[@exosproudmamabear558]

You can get 15 spf to get vit d if you gonna stay a short time outside. Vit d production has lower threshold than uv damage.. Also it is not just vit d the thing that produce vit d in our skin has immune and neurotransmitter modulator effect seperate from vitd production. You cant just take vit d and done with it body is a very complex organism.

[@zane003]

@@exosproudmamabear558 exactly. we shouldn't be maximizing one thing (DNA damage) and forget about the rest of the system which needs light

[@DasEtwas]

no sunscreen is good enough or applied well enough on average to completely block vitamin D production. every expert recommends still using sunscreen nonetheless. the remaining UV making it through the sunscreen is enough for your vit D needs.

[@zane003]

@@DasEtwas they recommended sunscreen and vit d from food and supplements. the wavelength for Vit D is UV-A and UV-B which are absorbed by sunscreen.

[@BruhdudeJX]

THE SUN IS A DEADLY LASER

[@PT9168-u4i]

not anymore, there's a blanket~

[@GuuMonster]

@@PT9168-u4i if it's still causing cancer, then it's still deadly... maybe not immediate, but still deadly xd

[@LinkinPark4Ever1996]

Hey I got that reference!

[@ashj_2088]

No no ,no no!

[@phoebecara4361]

​@@PT9168-u4i not anymore there are holes in that blanket.

[@eatyourvegetables1449]

What an awesome video to watch while I got pretty badly sunburned over the weekend.

[@astroguy2791]

I got a pretty bad sunburn a week ago (purely due to my own forgetfulness to wear sunscreen), and my skin is still partially red and has been peeling a bit for the past couple days. Watching this video did not make me feel good at all

[@eatyourvegetables1449]

@@astroguy2791 quite the same, I was tomato red, peeling all over. Don’t worry though, cancer rates for people under the age of 40 is like 0.5 percent. Cancer is a much bigger issue after the age of 40, it increases exponentially.

[@lordchadthe69thofsussex72]

@@astroguy2791 sunburn is your skin cells killing themselves to avoid becoming cancerous

[@robertgaines-tulsa]

I first learned about UV-C when watching BigClive on KZbin. He was talking about sanitation lights during the pandemic. There was this accident where UV-C tubes were being marketed as black lights. They realized there was something off when the tubes had a blue-green light rather than a violet light, but they thought it looked cool. The came down with arc flash burns on the corneas. They recovered, but it's really unpleasant. I'm not sure why the security guard didn't have that problem. Was he wearing eyeglasses with glass lenses? The security guard should have sued because it was the lab's responsibility to tell him.

[@derp195]

Apparently UV coatings on plastic lenses protect from UV C as well. It’s pretty uncommon to have uncoated lenses nowadays. As for responsibility, he ignored the sign warning people to stay out with the UV light on.

[@MrTastelessVideos]

Well the guard basically ignored the safety warning right on the door, so there were no grounds for him to sue on.

[@leonguyen896]

It wouldn't surprise me if the guard lied to avoid punishment or simply forgot. Of course, the former guard would say he did teach him when in court. He ignored warning signs and turned on specialized lab equipment (that look nothing like ordinary light bulbs)for hours everyday for months. It's hard to imagine someone not knowing what artificial UV glow looks like. If anything, he deserves a Darwin Award.

[@jeremy5602]

They did tell him. With big warning signs on the walls.

[@jagmarc]

This video isn't about UV-C it irrationally promotes overgeneralisation that all different types of UV are the same thing, for sponsor clicks.

[@drflash36]

Years ago, due to many overexposures to the sun, my arm developed a melanoma, which my Dr. caught. I then had it removed by a dermatologist. He recommended that I either avoid sun exposure between 10 AM & 4 PM, or otherwise apply SPF 30+ sunscreen if I must go out then.

[@gabrielleg4808]

Glad that you're ok now!

[@squeedles_1943]

This one hits close to me as I’ve been working under the sun for about 3 years now. Thank you

[@Kinguk22]

As long as you are wearing clothes and a hat maybe sun cream you’ll be fine this video is just telling you what could happen not would humans have evolved outside. You’ll be fine

[@shinola228]

I'm 65 and recently had a couple of skin cancers cut out . I told the doc it had been 40 years since I had significant sun exposure and she said it's common for it to take that long. Point being, even if you start covering up now you'll want to be on the lookout for cancer for the rest of your life.

[@Danuxsy]

@@Kinguk22 we did evolve in nature yes but don't forget that people in the past didn't have to care about dying of cancer, they died so early it wasn't a problem and the next generation had already been born. You and I do have to worry bercause we live much longer.

[@NathanDudani]

​@@Danuxsy ​pEoPlE iN tHe PaSt

[@gabrielleg4808]

​@@NathanDudani??? You good nathan

[@lpc9929]

I am infertile from eating scented candles. The

[@Abderahmane_iba]

wut

[@bryanlee6065]

The what? THE WHAT??

[@Lackinglard]

You! You're the guy who rates candles on your community tab!

[@PissBaby-o8f]

My hero

[@anti_honey]

The "the" is beautiful

[@tmoney2403]

Should be mentioned that UV can penetrate clothing and shade doesn't offer much protection either. The rays will reflect and bounce off of other objects. If you are serious about sun protection wear UPF clothing, wide brim hats, sunglasses AND sunscreen. Don't forgot to reapply it!

[@user61696]

But it is also important to get sun exposure for a few min a day. Vitamin D absorption (=active form) in the body requires sun light. I experienced vitamin D deficiency for the first time in quarantine, and I suffered from health problems I never have encountered before. So everything is supposed to be in moderation basically.

[@tmoney2403]

@@user61696 Yes agreed a few mins each day is important for health!

[@TerriblePerfection]

Not important...critical! I can't believe the poor advice here. Lack of full-spectrum sunlight is why humans, including children, are so unhealthy. ​@@user61696

[@IgnacioCuriel]

Hello! My dermatologist, and several other places I've read about skin care, says that UV skin protection is to be used not only "when it is sunny, or when you are outside in the sun". It must be applied everyday, even on cloudy/cast days because UV light/rays are not the same as visible light rays.

[@skythundersky1544]

Let's be realistic though. We would've long gone extinct if we were to get cancer that easily

[@iGame3D]

They sell that stuff.

[@JackieOwl94]

Yet UV light is vital to our cellular processes, particularly bone and skin health. It’s a deadly dance we walk every day.

[@darkscienceyt]

I blame evolution

[@Swenthorian]

Exactly. So like, where is the balance, y'know?

[@JackieOwl94]

@@darkscienceytI mean, evolution is just “survival of the…eh, good enough”

[@emily36130]

Same goes for almost all other stuff we consume, like salt for example

[@Fred_Klingon]

​@@Swenthorianthe balance is always ”a little, not too much".

[@2StrokeDriptroit]

I am a light bulb collector and my 2 favorite vintage bulbs are mercury vapor and fluorescent. I have several arc tubes out of both mercury vapor and metal halide lamps that the outer bulbs had been broken away on. These will still start and operate in this state, and since the quartz the arc tubes are made from (because it can handle the super high temperatures of the arc when in operation that can easily melt even Pyrex glass) this material is transparent to the full UV spectrum, which is absorbed by glass, hence these lamps having an outer glass bulb, and will cause eye irritation and damage, and skin burns if the outer glass bulb is broken. In rare cases, broken High Pressure Sodium lamps can do the same, as they contain mercury that emits UV and the ceramic arc tube is also at least partially transparent to UV. Halogen incandescent lamps are quartz and can as well, though a white hot tungsten filament emits far less UV than a mercury arc. These lamps can be a serious hazard if broken but still working! Also, clear fluorescent germicidal/ozone lamps are just as dangerous even though much dimmer than high intensity mercury and metal halide lamps missing the outer bulbs. I have these in a few sizes in my collection, and know they are dangerous as well! I used a 15 watt 18 inch diameter one I put inside of a clear acrylic tube I had cut to length that fits over the 1inch diameter T-8 germicidal fluorescent lamp to show the mercury arc that is in any fluorescent lamp but blocked from view by the phosphor to show what goes on inside these lamps. In just a few days of this demonstration, the short wave UV from this lamp cracked snd crazed badly! While it filtered out the UV making looking at it and being near it safe, the acrylic tube was destroyed. So UV is VERY nasty!! Sun lamps are either mercury vapor or fluorescent lamps with glass bulbs made of “Corex-D” glass, which is a mix of glass and quartz that can have various ratios of the 2 to provide the exact amount of a certain wavelength of UV, filtering out the more dangerous shorter wavelengths. Sperti made some portable sun lamps in the 1970’s that used a quartz mercury vapor arc tube and were causing severe UV burns because the entire spectrum was released! They were banned. Older ones used a corex-D low pressure arc tube tgat blocked the most dangerous wavelengths, much safer, but still capable of of causing UV burns. So while I collect these lamps, I am VERY aware of the dangers! Cheers!

[@mdshaler]

Mercury vapor rectifiers are one of my favourite types of vintage technology!

[@bitshtannicajohnson6957]

*Got any of the cool green bulbs advertised for use in warehouses at the turn of the century?*

[@ajwadsadique9388]

As a physics student this just felt like a photo-electric effect recap

[@darkscienceyt]

more or less

[@kamakaziozzie3038]

Keeping a UV source handy has been such an important tool for me. As someone that deals in cash transactions it’s the first method to detect counterfeit bills. When traveling and sleeping at at unknown location I always pull back the bedspread, turn off the lights and turn on my UV lamp. That can provide much information. After cleaning up my pets soiling action, using UV to make sure the job was done correctly provides much piece of mind. I ❤️ UV

[@niebieskaskarpetka8313]

Onward to learning how to help my body fight with cancer cells. Thanks for the video, you are truthly amazing!

[@darkscienceyt]

Thanks!

[@richardbrewis436]

I've begun watching the Dark Science channel. Truly happy to find your explanations about scientific material. Informative and very well presented. Thanks!

[@oh_my_science]

I've always preferred the Great Indoors. I'm told that I look young for my age, so that's a nice bonus.

[@campbellmorrison8540]

You didnt mention there are ( I believe ) 3 different bands of UV. UVA,B & C as far as Im aware UVA is the sort of UV used in nightclubs and is not considered dangerous. Im guessing UVB is on sun beds etc and is higher energy and hence can cause sun burn. UVC is like welder burn and will definitely cause skin damage, its the type used for sterilization and cleaning as it also creates ozone. Im only saying this because the general term UV is not very accurate in describing its dangers

[@richerDiLefto]

No, UVA rays most certainly **can be** dangerous. You see, UVB has a shorter, higher energy wavelength than UVA and doesn’t penetrate skin as deeply, so it tends to damage the upper layers of skin and cause immediate sunburn. UVA, on the other hand, has longer wavelengths than UVB. As a result, it can *penetrate deeper into the skin* than UVB, causing all manner of damage to tissues and DNA but without the immediate burning and visible damage of UVB. By the time you notice a problem after repeated UVA exposure (like from tanning beds), it’s too late.

[@emzed33]

this channel is so underrated

[@richard84738]

This is one of those rare videos that just pulls a whole boatload of disparate facts in my head together in a mind blowingly simple way. I can't believe how clear a lot of these connections are now. Like WHY does UV disinfect? Oh crap, it's literally the same mechanism that gives me cancer! And WHY does UV give cancer but regular light doesn't, and why are X-rays so much more dangerous. I knew all this stuff individually but never thought about it all holistically. Great video.

[@drasiella]

Oopsies.... _pushes UV lamp for curing gel nails to the side_

[@Monicaruthcw]

Always wear sunscreen/sunblock! ☀️

[@chainsawninjalcemist]

I started working in HVAC and I always bring a big sun hat with side flaps, cooling arm sleeves (easier than lathering up my arms with sunscreen every two hours) and sunscreen for my face i bought in bulk.

[@nugenki]

Having some welding experience,I knew UV could cause cancer, but never knew it was because of DNA damage. This should scare some of the welders that don't wear ppe Also cool to learn why UV is non ionizing, but higher energy spectrum lights do

[@darkscienceyt]

arc eye is terrifying!

[@SturtH9]

Did the guard not notice he was essentially getting sunburnt every night?

[@gabrielleg4808]

Also confused about this

[@DocEtan]

Sunburn is not the result of UV light but heat from the visible light of the sun. Hope this clears the air.

[@klondike3112]

​@@DocEtan It's caused by UV light. Sunscreen helps block ultraviolet light and prevents sunburn. Your skin does not get hot enough to cause burns from sun exposure.

[@SturtH9]

@@DocEtan “Sunburn is caused by too much exposure to ultraviolet (UV) light. It is a radiation burn, caused when the ultraviolet (UV) rays of sunlight damage DNA in the upper layer of skin cells.”

[@chimoshi3393]

That story at the end was crazy.

[@armchairnoob9493]

That feels so unfair for the security guard tho, he was never trained on the dangers of the uv light, and then he just got fired, with health hazards from work...

[@rpbajb]

Fired for sleeping on the job.

[@The_Chad_Davis]

Whats even more sinister are Infrared flood lights. Youd never know theyre on, except after 1 minute looking at it, when your retina starts hurting then burning

[@MikeSam-u8k]

Isnt this light science?

[@Uajd-hb1qs]

A few years ago during a heatwave, I went out to see my then boyfriend. It was only a 20 minute walk through a park but I found that my right arm had been severely burnt and I assumed it was cuz of my pale complexion but hearing now that it’s recommended to only be in direct sunlight for 15 minutes, that now makes a lot of sense.

[@Eduardo1007]

Not enough safety measures in place, and then fired the guard when they found out.

[@yottakm3764]

he was fired for seeking a heat source in the Winter ? all of this wouldn't have happened if the lab provided the poor man with heat in the winter ! who ever did this shit should prisoned for life wether it was an individual or a group price of punishment should be equal to the price of crime

[@Chicken_sandwich52]

You know there's a thing called a coat.

[@yottakm3764]

@@Chicken_sandwich52 You know there is a thing called workers rights !

[@Chicken_sandwich52]

@yottakm3764 If he couldn't handle getting a little cold, then maybe he shouldn't have taken the night shift.

[@yottakm3764]

@@Chicken_sandwich52 night guards should have a room where its heated , it's not just "little cold" if you can handle a little cold with a coat why do you pay for heating In the winter ?

[@Chicken_sandwich52]

@yottakm3764 i generally try not to use the heater unless I'm truly desperate.

[@theomegamuffin7346]

"No more than 15 minutes!" Me running an hour every day in 100° weather💀

[@physics_enthusiast_Soorya]

Woww, never imagined I'd understand cancer under 10 mins!! Thanks alot You earned a subscriber, I love these kinda information. Really grateful for this 🙏✨️❤️

[@weberito]

They did really bad job at making sure the new guy knows all the safety measures, then fired and in the end killed him, all that while peacefully cutting mice.

[@alfonsosalinas3026]

Always a good day when Dark Science uploads!

[@serraguden3538]

I've been thinking about this for a really long time thank you so much for this video!

[@Zzyzzyzzs]

You cannot make a video like this without going into the breakdown of the different types of UV light; it is literally the most critical part of the whole story! The majority of UV lights we encounter, e.g. black lights used in nightclubs, aquariums, bug zappers, as detector instruments and in things like dentistry, are UVA wavelength lights. This is the least harmful of all UV as it has the longest wavelength and therefore mostly lacks the energy to cause DNA damage. There is _some_ evidence that prolonged exposure to UVA can be carcinogenic but this is mostly inconclusive and seems to point to needing massive amounts of exposure (like literally surrounded by tons of it every day for years) to have any raised risk. UVB and UVC lights, which have shorter wavelengths, are the ones that are carcinogenic but, apart from the Sun, most people will rarely ever encounter sources of UVB and UVC (forensic detectors use UVB and lab sterilisers use UVC). You absolutely need to draw a distinction between these, or else you're not giving people the full picture. The last thing we need is people freaking out at dentists and nightclub owners for poisoning them.

[@Guenter34]

KZbin is a lonely place when you're not uploading. So pumped for this!

[@authordent41]

In My travels , a friend would keep himself warm by standing in front of one of his AMPLITRONS , I WAS TERRIFIED WHENEVER I seen cabinets doors laying about wondering is he working on something, or just keeping warm .

[@Brooo007MC]

Would have been helpful to discuss the different types of UV and how the lower wavelength is more dangerous than the higher ones.

[@donotreply8979]

... It's a spectrum, and he literally started that. Try listening

[@johnsmith8988]

Clean the cum out of your ears.

[@jamesmck896]

Yeah but uvc doesn’t get the rough the atmosphere and it has the deepest penetration of all uv light and there’s also uva and uvb which is why you need sunscreen

[@theanimeconnoisseur8629]

hey man, these videos are the best because for me, if I don't understand the mechanism behind something I don't do it, so thanks to you I'll use sunscreen, love ya

[@darkscienceyt]

you’re welcome

[@tnhl77]

1:54 to skip ad

[@TurbineResearch]

“The sun is a deadly laser “

[@TheVirtualArena24]

By far the best and simpliest explanation of electromagnetic spectrum.

[@Uncharted_Escapes09]

I love the way you explain things! Makes it easy to understand and remember. It is very interesting explaining how cancer works, do you plan on covering cancer as a ehole subject? Like, how are some compunds carcinogenic(such as Benzene) Why are some foods carcinogenic?

[@ExperimentIV]

my dad has a UVB skin therapy light for his psoriasis. it helps slow the growth of psoriasis plaques. not everyone with psoriasis can do it because of the risk of skin cancer. the lamps in the light are so strong he can only expose each half (front and back) of his body for 30 seconds, and that’s after working up to it. he has to wear goggles as well. he’s never had so much as a weird mole! but yeah i knew how dangerous uv lights can be (blacklights are generally safe. just buy them somewhere reputable) because he always told me to NEVER play with it, and i could see the strange light under the space between the floor and the closed door his therapy lamp was in, so i always believed him. also, when he needed to get new lamps a few years back (they take a long time to degrade, but they do degrade), the government covered it. it’s kinda cool you can get a prescription for lamp tubes and other medical equipment that costs a hell of a lot!

[@andiralosh2173]

Ignoring the literal warning sign for weeks to sleep under a carcinogenic light is WILD. I've known people who just love sunning and I've never understood it. Just feels like my skin is burning. Must be some reason people like it

[@andreahighsides7756]

It’s good for producing melatonin and vitamin D

[@andiralosh2173]

@@andreahighsides7756 absolutely. That must translate to some sort of craving? Seems rather arbitrary though, as it doesn't correlate with melanin levels

[@andreahighsides7756]

@@andiralosh2173 vitamin D production from sunlight does correlate to melanin levels

[@andiralosh2173]

@@andreahighsides7756 right, but I'm talking about the drive to get sun

[@warriorcast8567]

so i made a UV glue hardner that i call the melanoma box because the inside is bright purple when its on

[@korkser]

Would've loved this kind of stuff back when I was doing my undergrad. Would've made the higher level bio courses easier to understand

[@lucasperboni674]

I'm a metalhead/goth/introvert and i actually hate staying in the heat... but I have a mutation that gave me melanoma either way

[@WillySalami]

How the hell did the Security Guard not realize the "UV Hazard" sign in the door FOR SEVERAL WEEKS.

[@ellenbryn]

I sometimes feel guilty for having been sent to a private school… And then I feel bad because so many people don't even remember the basic middle school intro to the electromagnetic spectrum. We certainly didn't have this level of detail in the 70s and 80s - my mom was a microbiologist when they were still figuring out the cell membrane; cracking DNA was still a few decades off - even so, we were given a basic diagram showing longer and shorter wavelengths of energy, part of which was visible light, but there was also infrared (heat) and x-rays, gamma rays and alpha particles from radioactivity, microwaves which can cook meat in minutes, and ultraviolet isn't that fierce, but we have to wear sunscreen or shades and try to minimize it? So it's in that "bucket" of energy waves that can toast you more or less, and the nastier ones are radioactive and can cause cancer. that's a very superficial way of describing it - your video explains the science. But having a general knowledge of science used to be an important part of the US curriculum, back during the Cold War. what a pity that cultural priority has been lost now that we know so much more. I'm sure this guy is one of many thousands who have died in ignorance of something that the last generation wouldn't have, for the most part.

[@legltrapn196]

I'm melanated. I am protected

[@miscme7116]

I'm 47 years old male, and due to my hobby and work with computers, and generally reclusive way of life, I don't go out much during all my life. Now at this age, everyone I know who are the same age as me, look like they are 60 years old, they have wrinkly skin, while I have smooth and youthful skin, and my face looks still pretty much the same as when I was in my 30's. They've drank alcohol while I never did, and sunbathed, tanned, been in the sun a lot in general. The difference is significant and I can see it very well now. I was always worried about the effect on the sun as my skin burns easily anyway, so I always avoided it, and good that I did.

[@rileymannion5301]

Protect your data by giving it to another company!

[@smokeduv]

Just to mention, UV light also is in a wavelength range, so it gets divided into long and short wavelength (or near UV and far UV or, in marketing terms, UV-A, UV-B and UV-C). The kind of UV used for sterilization is usually UV-C, which is short wavelength, which in nature gets blocked entirely by the atmosphere, so we only get UV-B and UV-A. In the case of the guardian it was probably UV-C (although I've probably seen some UV-B lights, because UV-C glows in a pale blue and not violet for another reasons), so yeah, very damaging, but UV-A is "mostly" harmless in short periods of time and is the one used for hardening adhesives and resins because of the mentioned cross-linking nature and for most of the crime scenes investigation, but the thing is, UV-B which causes sunburns (and in very long exposures or for many years causes cancer) is also responsible for vitamin D synthesis in the body, so we need some UV light in our lives, just not a lot, so don't be worry of the sun, just get some protection when staying outside for long periods of time

[@SuperMarway]

Very good and informative video. Thanks for pointing out that alcohol causes cancer, because people are igonrant when it comes to their addiction.

[@dsi7pj]

4:08 learning light being waves and particles in physics was the toughest part for me

[@YP2016]

New fear unlocked

[@shdwbnndbyyt]

One note, as someone who is very light sensitive. IF you wear sunglasses, you not only need UV and blue absorbing lenses, but you need face hugging glasses that leave little space between your face and the glasses. Your pupils open more when the sunglasses are worn, and the shorter wavelengths can diffract into any open gaps. Multiple studies have shown since the 1970's that wearing standard sunglasses expose the retinas to MORE short wave light than not wearing the sun glasses.

[@zetnakatel]

Not even a metion about UV-A B or C there is a big difference.

[@cxireen2193]

And what's that?

[@bradley3549]

He specifically called out the wavelength range of particularly problematic UV. I think that's sufficient.

[@gooxo9894]

why does KZbin always take so long before reminding me that you posted, amazing video.

[@adamwyman4629]

Excellent explanation of the electrromagnetic light spectrum as well as UV radiation causing cancer!

[@johnsonnghiem9018]

Thank you for passing this on. I happen to work with UV lights on rare occasions at work with micro soldering. I try my best to becareful & look away aiming the beam away from me & only directly on the device with the uv glue sealant.

[@tonyvs2]

Great video, but to be specific at 6:00 you said Thymine and Cytosine are nucleotides but they are specifically nitrogenous bases that are a part of nucleotides. Very informative video though!!!

[@darkscienceyt]

Good catch!

[@PersonaSlates]

Never go in the sun ever. Got it!

[@sshuggi]

9:40 Squamous and basal cell carcinoma is far more common than melanoma (in the millions per year compared to 200k per year.) Carcinoma occurs much more commonly on sun exposed areas like the face and arms and legs. Melanoma is a bit counterintuitive, it occurs irrespective of sun exposed location (like the example you show on the back) and is neutral to negatively correlated to sun exposure. (Likely due to the immune function pathways signaled by the increased vitamin D) Rates of melanoma have been increasing since the 70's even with ever decreasing amounts of sun exposure nationally.

[@mikemrod-7167]

What about those at-home teeth whitening kits that include a UV light device that’s placed in the mouth?

[@lordchadthe69thofsussex72]

different wavelength which is only carcinogenic if used regularly for hours on end every day

[@curiousaustriantours6962]

Fascinating! Love these videos. Particularly, how these things actually work.

[@thesaurusrex7919]

We use UV lights in air handling units for hospitals HVAC.

[@AshLilyNeko]

I did photography in college. in my advanced class we got to do different types of development techniques. some of them were very old techniques that involved using the sun to develop photos - most often we used a method called cyanotyping. you use a solution with a special type of cyanide in it and it makes really beautiful blue (cyan) exposures. even though I am in Texas, this process can take 12 hours or even more using actual sun, so we had a sun lamp which was in its own special room. we had to wear protective gear because the lamp was so powerful that it could do in 10-15 minutes what it took the literal SUN to do over the span of 12 hours... it was a very expensive and powerful UV bulb. I can't imagine sitting under something like that and not realizing it was damaging you, though. maybe the lamp at your work was less powerful, but even 5 minutes exposed to the bulb at my school could leave you with bad sunburns.

[@SECONDQUEST]

When did this guy get almost a million subs? Jeez

[@Megadextrious]

When I was about 12 years old, my family went camping in Ensenada, Mexico on el faro beach. We are a family of addicts, to be frank, so naturally all the adults were drunk and us kids were blazing and sneaking beers. Basically what I’m getting at, nobody even thought about putting sun screen on me and I ended up with the most horrendously painful 2nd degree burn all over my back. I had so many blisters, I would cry in pain just from my mom putting aloe Vera on my back. It was one of the worst experiences of my life. So, fast forward to last year, I’m 34, at the dermatologist just for a little check up when she notices a weird looking mole on my back. They take a biopsy and call back a week or so later; Basal Cell Carcinoma. Just on a regular, normal day, no symptoms, no worries, just a simple check up and boom. Cancer. (I had thyroid cancer before too but don’t know what caused it) I told the doc about the bad sunburn I’d had 22 years ago and she said, “Yeah, that’ll do it.” Moral of the story is USE SUNSCREEN OR STAY OUT OF THE SUN! 🌞 It really hurts 😭

[@bigture]

just a food for thought. in the last couple of years, did you get vaccinated?

[@mrlee9213]

I spend a lot of time outside and I can confirm getting as much sunshine on your skin is really good for you. Especially when combined with swimming/diving into sea water. I do not use any sunscreen at all.

[@invisi6l339]

WTFFF the former security guard failed to warn and train the new guy, and the new guy got fired for someone else's fatal mistake??? LMAOOOO this facility is a HUGE RED FLAG

[@superniko20]

And people tan for hours in uv beds? How do they say its "safe"?

[@GalaxyStandard77]

Cause they put a type of lotion on their skin. So you honestly think they just get in the tanning booth without protection?

[@superniko20]

@@GalaxyStandard77 it still ages your skin and makes it darker so it definitely hits your skin.

[@HobbyOrganist]

@@GalaxyStandard77 And who is to say the chemicals in that lotion doesnt cause cancer?

[@Genorgin]

@@GalaxyStandard77 no that's optional you don't have to wear the lotion in fact some tanning booths sell lotion that will makes your skin tan faster

[@SwagRum76_]

I'm really liking these videos. Keep up the good work!

[@matijavinazza9861]

Do UV flashlights you can buy anywhere, without any warning as far as I can tell, emitt this harmfull wavelength or do they have some kind of a filter or something to not be dangerous? As an example I found one with 365nm wavelength. Sorry if it's a stupid question, I'm not very knowledgeable on this subject.

[@AttilaDaHunk]

I wouldn't worry. Those uv flashlights have a larger wavelength compared to uv sources that are normally considered dangerous. There is also a lot more that goes into what makes certain sources of uv dangerous than just its wavelength as well. Radiation is not a cancer death ray. Even sources that put off a tremendous amount of radiation can be safe if you limit your exposure time to it. So you will be fine as long as you don't bask under its light all day every day.

[@unit0023]

he says that emr in the 315-400 nm range can allow these dimerization reactions, however danger should be mitigated by not pointing the flashlight at skin or reflective surfaces

[@stephweasenforth7891]

Nothing like flashbacks to when I worked as a hospital housekeeper during peak wave 2 of COVID. Mild sunburns in the middle of January thanks to the Moonbeam UVC light was always a fun conversation. Thankfully, it never took me longer than a few seconds to notice exposure and move to a safer area while the light worked its magic.

[@octosalias5785]

So black lights will be this era's radioactive paint?