SD Card vs. Radioactivity | Data Loss?
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- čas přidán 22. 04. 2021
- Have you ever wondered if radioactivity affects the data on flash memory like the SD cards in your camera? In this video I will test an SD card against some naturally radioactive minerals. They are thousands of times stronger than natural background radiation, but will they erase data on the card? Time to find out!
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#Radioactive #SDcard #Yourwaytospace - Věda a technologie
This will be useful when I bring my SD cards to Chernobyl.
The SD card will survive the elephant foot but you won't.
Chernobyl is not that bad unless u go to some of the real bad areas but there pretty much offlimit unless you bribe considerable amounts
Hmmm
Or when you have to run your phone through the x-ray machine at the airport.
😂😂💀
The fact that the geiger counter does an SOS morse code is still hilariously terrifying.
Yes, SOS is a call for help, not a warning to get out!
The uranium is sentient
Why would that be terrifying? I bet it's a built-in function
@@mortbobkanciastostopy9038 It's like Geiger counter, whose existence is to just sense radiation and would be expected to be accustomed to normal radiation dosages, too is terrified of the amount it's seeing and is desperately calling for help.
Radiochemist here. A Geiger counter is not a real thing, that would be refering to a specific type of radiation monitor (sometimes called a radiation counter) that uses a Geiger-muller tube as it's method of section. The device in this video wasn't even a radiation monitor as it wasn't measuring counts, it is what is called a dosimeter as it measures radiation dose rate.
I participated in a study investigating the vulnerability of different semiconductor circuits against ionizing radiation during my student years. We came to the conclusion that flash memory is pretty much indestructible when it comes to gamma radiation (at least against the intensities we could create). The vulnerability is the flash controller. Gamma radiation can cause current surges within the electronics when they are powered up, frying them. Even with a surge protection circuit it can cause the flash to be erased because of a current surge on the control lines. So you might wanna try again with the card inserted into a powered card reader for example.
18:17 Your samples are definitely strong enough to destroy data. However, the largest part of the radiation emitted by natural uranium ores is alpha radiation. Even a thin layer of paper is sufficient to effectively filter away this radiation.
Remove the plastic case and, if there are any, every other cover around the chip(s), and you will see a different result.
Who does that? The result will be useless
that would defeat the purpose of this video
Alfa particle contamination everywhere.
The reason servers use error correcting memory is because they run 24/7 and can experience single bit failures from cosmic rays.
Yes, radiation will affect electronics in rare cases. But for flash memory not being read/write it takes a lot of radiation. Need to upgrade my samples x) Thanks for watching!
@@brainiac75 Is it possible to check for real-time error on the SD Card while it is being blasted with radiation?
how crazy is that?? a gamma ray burst 1000 light years away could be the reason your email wont load LOL
@@brainiac75 Hyrdaulic Press Channel did a video at a particle accelerator in Finland where they subjected an old Nokia phone to direct radiation from it. The phone appeared unharmed in the end and still seemed to function, but that's just Nokia I guess. czcams.com/video/M9_wupYj02M/video.html
@@stonent what you expect? It is nokia 3310!!!😂😂
Next time, on brainiac: SD card vs dark matter.
Oh yes, I am looking for other ways of testing the card without visibly destroying it ;D Thanks for watching!
SD card vs Anti Matter
I think that is already on going. Nothing seems to happen.
SD card vs. neutrinos.
@@brainiac75 jeg har en Radium kilde fra en DP-63-a der giver omkring 2mSv/h eller der omkring med beta og gamma. Jeg har ikke en geigertæller der kan måle højt nok desværre, så jeg kan ikke være sikker på aktiviteten. Men du må gerne låne den hvis du vil 🙂 Jeg er fra midtjylland. den har det dog med at kontaminere alt den kommer i nærheden af.
These are exactly the kind of experiments I want to see! So happy to have found your channel. I hope to get/find some of my own radioactive samples one day!
Coming back after a few years to see Brainiac's channel doing so well gave me the feels. Keep it up dude
The problem is that alpha particles are incredibly bad at penetrating things. They probably didn’t make it through the SD card plastic cover
Agree, alphas won't do much on an SD card. But there is a lot of gamma radiation coming from the samples too. Look up gamma radiation from bismuth-214 for example. But the intensity from natural samples do seem to be to weak. Thanks for watching!
Those 2 Mev gammas are hitting the SD card like a pebble would hit a tank. You'd need Gev gammas to see an effect.
@@brainiac75 *_Brainiac75, Nice name-!!_*
@@brainiac75 better way to see data change after tests isnt just hashes, but also those hex editors that can compare data bit by bit so u know where exactly the data changed.
@Lasagne did u read EVERY WORD of my comment? do u know what "...isnt *just* hashes, but *also* ..." means???
"this is equivalent to over 40 years of background radiation"
over 40 years would do more to the SD Card than the radiation will ever do
exactly my thoughts
Yea but it's about radioactive radiation only, there's of course more than that
In theory, if it was kept under normal indoor conditions, maybe 70F and 50% humidity, it should still be fine even hundreds of years later. The issue would be finding a device in 200 years that would have the ability to accept the physical format.
i think the worst it can happen in 40 years is the pins having corosion
@@UnipornFrumm which is exactly why they're coated with a thin layer of gold. To prevent natural corrosion.
Completely unsurprising result. Comparing the amount of radiation to background makes it sound like a lot but it's actually pretty miniscule. The card's shape works to it's advantage too; it's too thin to absorb much beta or gamma radiation when placed right up against a source like that, but the plastic case will be thick enough to shield the internal electronics from alpha particles.
Very clear format and visuals, interesting topic. Lovely video!
"next week I enrich the Uranium and see if the SD is resilient to a full Hiroshima equivalent detonation"
You indirectly and unknowingly spoiled the video.
If he wants higher energy radiation he can take it to CERN (though I suspect the scientists there have more important stuff to do).
@@marc-andreservant201 i think they would’ve preferred a sd card over someones head when it comes to putting something in the way of the particle beam.
He lived too.
Lmfao
@Waldel Martell The LHC particle beam consists of protons. Which are probably more damaging that gamma rays at the velocities they use.
Sounds like you need to partner with someone who has a particle accelerator! 😁
Oh yes, or build one myself :D Thanks for watching!
@@brainiac75 heh, I've sent a message before reading this. You wont be needing 1 MeV of a particle accelerator to achieve that effect on an microsd. Check you my message in here.
That would honesty be interesting did you hear about that person that put their head in one by mistake and has brain damage
Harrison Wells intensifies
Behold, the cancer-inator !!
Me: ‘puts sd card somewhere safe’
*Sd card corrupted*
Brainiac75: *Exposes sd card to radiation and works perfectly fine’
I've been here for the last 8 years. I still love this kind of content. Very interesting to know what happens with magnets or radiation :)
5:53 You called them beasts right as the counter displayed 666. 🤘
!!!!!
wtf lol
Uh oh....
coincidence?
He's saying their strong in radioactivity lol
Hi! Just wanted to chime in and say that I fly CubeSat satellites in low-earth orbit. They face a ton of radiation all the time. One of my satellites has 5 different SD cards onboard, and they're all just normal ones you can get at any electronics shop (not radiation hardened or anything like that). They haven't had any data errors, which is great!
One thing to be aware of is that SD cards require a relatively high voltage (over 10 volts or so) to erase their contents. This voltage is generated by a "charge pump" which boosts the voltage from the normal supply voltage. However, charge pumps aren't very good in radiation environments, so over time they can die, which ultimately ends up making your card fail into a read-only state. You'll never see issues with your files, but you will find that you can no longer CHANGE the files.
Just a thing to be aware of, might be worth testing these irradiated cards for this failure, or give them some more time and see if they go read-only!
Hi! I have some questions to ask you. I'm doing Cubesat project, my project is similar to your project, we want to know that did you shielded your SD card or not. And if you are okay to share some detail of your Cubesat, we want to know how height and inclination is your satellite orbited?
😢 i’m not ready yet to go home
You are risking your life for a video. Hats off to you man, you're a legend.
It's so funny & educating at the same time . Love you Bro. God Bless you
As soon as I checked my feed and saw this, my eyes lit up. Anything involving radiation or Chernobyl gets my attention. Immediately.
same
same
Me too!!
I assume you’re familiar with the Kreosan channel then
@@Jakefrc yes I watch kreosan!! I only discovered it a couple of months ago, but have binge watched alot of them. I love the mad experiments that they used to do in some of the older videos, also all the Chernobyl exclusion zone ones are good too!
PNY should make that their next advertisement
"You can even try to break it by smudging it between two thicc highly radioactive blocks and not a single bit will be damaged!"
Beautiful piece of torbernite👍
I've seen there are even pieces that are pretty clear.
The piece that I own is pretty small and not clear, but I still like it a lot. I'm always excited to go in the garage, open the lead box where I store all my radioactive minerals, and just look at these beauties from time to time.
First time on CZcams I've seen a sponsor inserted into a video and I thought wow, that's cool!
This is awesome. Radiation is extremely interesting to me and I don't mess with it so watching you test this let's me live vicariously through your videos. Thanks for being safe and preaching that importance. I'd like to see more Radiation tests
"aw damn it, I accidentally dropped my sd card in Chernobyl"
"Oh dont worry, your data wont be lost, I just found a random youtube video regarding to this"
Very interesting to watch deffinatly gonna subscribe
Wasn't sure what to expect going in. Seeing the results is nice to know.
YES!! He uploads on a friday. By far my favorite youtuber!
Thanks, David :D I usually aim for uploading the last Friday every month. This month I was a little ahead all the way. Sunshine and spring gives me an energy boost!
i am from the Region in Germany where your Pitchblende Sample is from (Hartenstein is right next to my childhood home)
Pitchblende is so radioactive because it contains trace amounts of Radium.
@@kuroyami3471
most definitely!
the unusual high radiation of Pitchblende(compared to Uraniumdioxide)
was what led the Curies to discover the existence of the elements radium and polonium in their research in 1898
Here in the American Midlands (me personally in Chicago), or what is also called the southern / eastern half of the Midwest we have tremendous subterranean radium / uranium mineral deposits. This makes it actually quite dangerous to build houses with basements, and especially to live in basements or houses with underground foundations that have poor circulation and known ingress of radon and radium. Almost every house in my area has to regularly be checked for acceptable levels (almost none are free of radon incursion), and if you ever visit Chicago, be sure to look around at the houses for radon filtration (basically house air pumps), they typically have a radiation warning symbol on them and hang off the sides of homes as they vent to atmosphere (virtually all you can do is dilute the radiation). I remember reading somewhere that the reasons that such deposits are so close to the surface and so dangerous is that they were exposed by glacial till and removal of many layers of the surface during the last ice age.
I'm not sure if this is common elsewhere, but it's definitely interesting, and somewhat concerning as I rent a garden apartment (a basement) myself.
@@kuroyami3471 my hometown also has a 30% chance radon levels in the basement are over 300bq/m2
there is a famous hot spring nearby whose light radiation caused by the radon content is considered healthy for all kinds of skin diseases.
pitchblende however is a different story - longer exposure, or worse skin contact/dust inhalation will give you severe radiation poisoning and probably kill you.
Nice video! The reason for the absence of any bitflip is because the energy involved with this kind of radiation isn't nearly enough... even if the total amount is still considerable. Bit flip can occur from cosmic rays which travel at near the speed of light carrying an immense energy in comparison.
Well, I had never tought about this when we examined Uranium and 137Cs doses in biophysics class, I just put my phone right next to the samples haha. Quite interesting video, will look out for this in the future.- Pharm student
I didn't realize how much I needed to know this 🙌
I bet you could get NASA to do an experiment to put the SD card on the outside of the ISS for a few months, and see if the most sturdy SD card you could find would survive.
The station isnt very shielded to begin with and the computers on the ISS have been running windows xp for like 15 years now
Irradiation tests aren't done randomly exposed to elements like that. You definitely don't need to go to space. There are much more intense sources. Usually a source like Co-60 is used because it's got a solid gamma decay, and an irradiation experiment can run at several Gy/h for a couple months and get kGys worth of exposure. In those cases you can start seeing the effects on matter.
@@sunryze3318 maybe ? i havent checked you might be wright, i just remember the tell tale green start button of windows xp on the vids ive seen of the iss
@@jeepsblackpowderandlights4305 wow they need to upgrade
It will not survive even a day. Take a look at some of the video footage shot on the ISS. The camera sensors are full of dead/faulty pixels, caused by interstellar radiation. And that's inside the craft.
11/10 video. Great content, mein Freund.
Really helpful! Thanks
I'm pretty sure there is error correction built into an SD flash controller. As flash wears out the controller has to compensate for bit errors. This would mask all but the worst corruption from any source.
2:04 "I'm told it's the equivalent of a chest x-ray, so if you're due for a check-up..."
yea but chest x-ray is a short flash like the flash of a camera (actually even shorter). Sieverts x time = actually danger :)
@@BruceCarbonLakeriver Congratulations, the joke was right in front of you but you didn't notice it. That is a quote from Chernobyl TV series, " " were a clue, it's a rather famous radiation joke among people who watched the show. Also the units displayed by the meter already are in correlation with time, uSv/h.
@@bluef1sh926 oh it might be, sure. But I don't have the time for watching tv shows bud :)
@@BruceCarbonLakeriver r/woosh????
Thanks for the warning about data loss in outer space.
I'll keep that in mind next time I go there.
Good information thanks for sharing
At work, we have to deal with cosmic-ray bit-upsets (avionics). It would be interesting to see the effect of your minerals on a running computer. Like a raspberry pi running a memory test.
Cosmic rays are far more energetic than the gammas coming off of a hunk of natural ore.
I got atomic ache after watching this video. Thank you brainiac75 :)
You deserves more subs
I'm happy you used the correct form of "data". Many people don't realise that data is the plural, and use awkward words around it.
I love the difference between how this guy handles radioactive verses someone like Thunderf00t
The handling techniques in this video are vastly, VASTLY overkill for the levels of radiation and contamination present. He's doing it that way mainly for entertainment value. The risks from handling a piece of uranium ore for a few minutes that isn't shedding any significant amount of dust and washing your hands after touching it are probably on the order of taking a flight from NY to LA - ie. utterly trivial. Phil Mason's personality may leave a LOT to be desired but his radioactive material handling practices are perfectly adequate.
@@Muonium1 For Brainiac, I feel it's also about teaching his viewers about dangers and how to handle them, even if it's not something 99% of people will ever come across. He has the little 'dangers present' thing at the beginning of the video, and whenever he takes some safety precaution, he explains what he's doing and why. It's a nice reminder if you ever come across similar stuff in the real world.
@@erictheepic5019 Also, people who get their education on safety from random CZcams videos are unlikely to be able to accurately assess the dangers they are facing all the while being able and even likely to encounter them as they watch his videos. (Even radiation. You can buy samples of radioactive materials, at least in the US. Idk how strong they are tho.)
@An Orange because no one is handling them every day unless they actually handle them at work, in which case there would be specialized handling equipment and dosage monitoring in place anyway.
Or Bionerd23... Heres a piece of uranium core from the Chernobyl reactor in thia ants nest.... I'll pick it up... Owww I'm getting bitten by radioactive ants!
No one
Absolutely no one
You:
Let's expose a SD card to uranium
Technically is not uranium pure, or the FBI will be on your door xD
Hehe, I am a niche channel with original videos. I will let mainstreamers take care of the mainstream :D
@@brainiac75 Mainstream is boring lol... Your channel is always informative and definitely filling in the cracks that many don't touch
I've wondered this tons of times. Every time I go through airport security I wonder about bit flips in my phone. I will wonder no more.
Thanks for your sharing
I have asked this my self but coincidentally I don’t have access to this sort of stuff, I expected something to happen considering how complex these tiny things are, incredible how durable flash storage is
This is more a demonstration of how feeble his radiation sources are and not how robust an SD card is.
Dam! was gonna swallow some of that stuff to erase the data on the chip in my head🤪
after reading this, the covid-19 vaccine chip in my head got mad
Nice testing! For the past few weeks I've been running a similar experiment, testing a Raspberry Pi 4 for online RAM bit errors using a radium watch dial (40cpm beta), with no bit errors detected yet. Evidently it takes quite a bit more radiation, or the energetic stuff like HZE GCR, to induce a measurable number of bit flips.
Maybe the testing data of these SD cards and RAM chips with beta and alpha radiation can be used to design high performance memory chips for future space probes. :)
@@thatguyalex2835 Yes! I actually started the experiment just to find out what data corruption pattern I should expect from radiation-induced soft errors, to help design error-tolerant software. (Two weeks ago I upgraded to a 500cpm thorium dioxide source, but I still haven't seen any bit errors in the 2GB of Pi RAM I'm watching...)
"that would be out of this world" hahah I just love this channel
Nice work👍👍👍🙂🤝
O: somebody uploaded, yay. this makes me happy
Great Video. I'm long time subscriber to your channel. Probably the SD card is resistant due that is not running I guess. Probably you should test a running SD card or maybe try to destroy the computer not in magnets but in radiation like you destroy the servers and your old computer
Interesting video! Are your 858uSv/h you got with the Radiascan on the pitchblend with or without shielding cover?
Beautiful video.
I'd be interested to see this experiment repeated with a beta emitter. Charged particles such as electrons (beta rays) are much more effective than photons at liberating charges when passing through material.
Would be interesting to see if there's any difference if the card is in operation vs powered, ie write a known file while in the radiation and then read it back both outside and then inside the field again..
I like your way of thinking. But I may have trouble testing it. I guess an external SD reader/writer could be opened and expose the card while writing. I just feel the intensity from my samples is still too low... Thanks for watching!
@@brainiac75 Easy enough to do, just get one of those USB memory stick card holders, and put the card in it. Then a ziploc bag around the card and a long USB extension cable, a powered hub and then the PC. Most likely the corrupted data will come from the USB converter, as those use much smaller feature RAM in them, which is a lot easier to flip bits on.
Another test will be to take an old desktop, nothing spectacular performance wise, with some DDR memory in 2 banks, with a gap between the banks (so a bank of 4 with only the outer ones filled) and place the green sample in a thin ziploc bag between them, and run Memtest for a few days, and see where you get the single bit flips, in the chips nearest the sample.
@@brainiac75 There are some really great little micro SD card breakout boards for like $2. The micro SD card holder is almost completely open and made of plastic. That should allow you to use an external micro SD card reader and a USB cable. That would be a great test.
At these levels there wouldn't be. This is not nearly enough radiation.
Nice information 🙏
Excellent experiment 😎👍
Try this again with a smart media flash card. They lack fancy things like memory controllers or error correction 😁
The flash memory chips are only on the top side of the PCB, since all that's on the bottom of the PCB is the solder mask (paint)
Nice video!
Would be interesting to see if you could damage the flash memory containing the firmware in your geiger counter or spectrometer by too much radiation :D
Holy crap i forgot about this channel for so long
nand flash is actually pretty unreliable so they always use fairly sophisticated error correcting codes, you probably did damage a number of bits
Eh, maybe, but SD cards are normally made using failed SSD chips nowadays, so I doubt the hardware is of any decent quality. I don’t know whether these cards have enough room for full ECC functionality alongside the controller die
If you get an XRF spectrometer, one of those handheld ones, then point it at the card, that will do it.
The closest I got to something horribly radioactive was decades ago when my high school teacher brought out a clock with radium dials. The Geiger counter had a poop fit when he brought it near to the clock. Even at that young age I was horrified when he picked up the clock with his bare hands (hand touching the dial painted with radium).
Holy hell this guy's voice is so calm and relaxing.
Maybe you could try using RAM memory, using known good ram (memtest86), run the test again with some radioactive material strapped to it :)
That's an excellent idea. I would like to see that as well.
Yeah would be interesting
RAM doesn't store data when its not powered so this wouldn't do anything
@@GrandNebSmada It has to be in a motherboard and powered to run Memtest86 on it.
Too good. What about your blood type? I'm O negative, the universal donor
Thanks. I have a very common blood type too, so no lack of supply if I need a transfer :D
@@brainiac75 which one?
@@brainiac75 thoughts on john dillermand?
Great video!
And congratulations on your fantastic English, to the extent that you used the correct verb with the plural "data" ("datum" being the singular) i.e. "are the data alright" (7:48). I doubt many native speakers get it right! 😁
I think the nature of solid state storage may have something to do with the null result here; when unpowered, the data is in its most stable state. The data would be most vulnerable to corruption by ionizing radiation when it's in the process of being written to memory. You would need to have a device connected to the card and constantly writing data of a known hash to it while the card is being irradiated to have a likely chance of seeing a flipped bit.
Yes, yes very well done indeed. Very emotional...
For the next video I'll blast this damned cards with a nuclear bomb.
The cards survive.
God damn it I have to make more content now!!!
2066: can a hard drive survive being shaken at 800k rpm while open?
@@UN4YA_Content while there's a certain chance that the hard-drive can also create a blackhole.
If the cards do survive does that mean they are made out of nokia phones
@@genericname2948 you mean nokium?
Though, if you are talking about radioactive, then I think it should work fine. But the necular explosion is also causing the card to break since this thing got hit very hard.
@Brainiac75 First of all, love your videos! I've experience on radhard for satellite R+D on microsd using Cobalt-60 ionizing source of a couple of curies of effective dose or aprox 200 gray hour. Originally intended to sterilising food products like dog/cat food or human food like apples for world-wide cargo shipment. Whatever we use, nothing can survive, but, the interesting thing you might be interested on is that we found the same equivalent results using radiotherapy low-end equipment, instead of spending thousands on a nuclear testing facility like before. Will gladly share anything on private.
Hi Marian! Glad to hear you like the videos. And thanks for sharing some of your experiences. I am definitely interested in hearing how you managed to affect a microsd with radiation. Can't write my e-mail here since all the bots will find it. My e-mail is however available on my channel here: czcams.com/users/brainiac75about
I'm interested to see magnet & strong radiation test on a general-purpose microcontroller, get an STM32M, and/or ATmega328P, then test against flash memory, then on the checksum of the maximum possible random bits buffer in RAM memory!
WTF? Your strongest example is from close to where I live! Greetings from Chemnitz!
The last two look like regular rocks which is scary because someone may mistake them as harmless 😯
4:55 radioactivity goes
*M E N G G O K I L* 👍😎👌
Menggokil👍😎👌
akhirnya nemu yg nyadar
👍😎👌
Great experiment! Next, how long on the uranium would it take to flip a bit on a file.
You should show the Backside of the radiascan before Measuring to check how the Energy-Filter is set or whether the Geiger-Tube is completely open.
I would suspect that there's error correction happening in there!
It's funny to believe that I would actually be a valuable candidate for the ESA in 6 years if I play my cards right as an Energy Engineer. That's honestly way better than I expected.
omg this is random yet extremely helpful .. wow 😳
Curious about the built in parity or error correction in those cards. You might be getting bit flips but having the SD card correct the faults.
NAND Flash is fairly poor in general and without active error correction it is near unusable. There is a small microcontroller in the SD card which fixes errors.
this rock is an art-piece . f*** now i want a radioactive rock lol
We all do
Notification squad😎
Early watch indeed, thanks!
I’m incredibly terrified of radiation and would not want your rock collection anywhere near my village. Thanks for doing the experiment so I can see!
Relax. You have been exposed to radiation every single day of your life. You're still here. Your body itself is radioactive because of Potassium-40 inside you, without which you'd die of hypokalemia. You owe your existance to radiation, because without it evolution can't happen.
I think you should have used a larger amount of smaller files, this would give a more precise insight on how mach of the card was altered. But since there were no changes at all it doesn't really mater.
Great video anyway.
Are you chernobyl news reporter?
xD
It would be interesting to know the memory cell technology of the card, how many nanometers apart the memory cells are and so on. That would help us better understand what sort of energy density is used to flip bits in normal operation, and imagine what radioactive level might be needed to flip bits.
You probably should learn more about the error correction in these devices which would transparently fix any damage radiation might do.
You are so crazy. I love yours videos
Great Scott
I look forward for the SD card test on the Elephant's Foot. =)
Love your videos! However since your videos are quite technical - I am behooved to comment on Hashes. When a HASH is different - the represented data IS GUARANTEED to be DIFFERENT. However, when a HASH is same - it is only POSSIBLE the represented data is the SAME - it is NOT A GUARANTEE! ( As a side note, the data size MUST be the same when using hashes. ) To be clear, in your specific use-case, using hashes is acceptable. I just wanted to take the chance to clarify on hashes as their are far too many claims about hashes that are just not so.
You should send a few in a balloon to the stratosphere with different kinds of shielding for the cosmic rays. This video prompts gamma rays are ineffective in corrupting data, perhaps with cosmic rays you can test if a wider spectrum of waves is more dangerous for the SD card than exclusively high-energy gamma rays. Perhaps the size of the wave is more important than its energy.
Don't forget that during the disposal of the extremely radioactive graphite off of the roof of the sector 4 reactor in chernobyl.
they once used a robot to do that.
Guess how long he survived...
1 and a half shitty minutes
This whole time I was wondering if this channel was a continuation of the show Brainiac: Science Abuse
i love how calmly he talks about high radiation
I decided to record the explosion of Herosima, but alas, the data was erased from the SD card, thanks for the video, next time I will be more prudent.
There are some places on the Earth, e.g. Ramsar, that have background radiation of almost 100 micro-sieverts/hour, so your sample is not so hot after all. Try visiting someone in hospital who has had a gamma scan to see what levels your Geiger counter can go to.