Strontium: It Knows Where You've Been

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Your teeth contain traces of strontium isotopes that can reveal where you lived while they were forming.
Hosted by: Michael Aranda
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Sources:
www.asu.edu/clas/shesc/facult...
books.google.com/books?id=GuH...
archive.archaeology.org/0705/a...
www.sfu.museum/forensics/eng/p...
classic.geology.ucdavis.edu/cl...
www.ncbi.nlm.nih.gov/books/NBK...
westerndigs.org/victims-of-hum...

Опубликовано:

6 дек 2015

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Комментарии : 506

@EugeneKhutoryansky 8 лет назад

Getting some information out of people is like pulling teeth.

@seanyworny104 8 лет назад

Nice

@avi8aviate 8 лет назад

Not a bad joke!

@eviltigz 4 года назад

Is it safe?... :p

@516btaylor 3 года назад

⬆️⬆️Underrated comment⬆️⬆️

@Sam-gj8kr 8 лет назад

West Cahokia born and raised, the mass grave was where I spent most of my days

@TitanOfClash 8 лет назад

+Sam.donald Taylor You should be more appreciated.

@Monochromicornicopia 8 лет назад

+Sam.donald Taylor Chillin out, maxin, relaxin, all cool and shootin some strontium outside of school

@stiimuli 8 лет назад

+Sam.donald Taylor this made me lawl =P

@MidorinoNinja501 8 лет назад

+Sam.donald Taylor, When another tribe, they were up to no good, started making trouble in my neighborhood

@stiimuli 8 лет назад

Kaila P. We got in one little fight and we all got dead and then paleontologists pulled the teeth from our heads!

@6darkness6eternal6 8 лет назад

♫Through the rain of strontium 90♫

@AbbieBrockhurst 8 лет назад

literally the reason i clicked this before i went to bed

@jenniferalt4493 8 лет назад

I was hoping someone would comment that. It was the first thing in my head when I read the title 😂

@Nobody-vr5nl 8 лет назад

it's not 19? I've been singing that song all wrong...

@6darkness6eternal6 8 лет назад

Nob ody No sorry strontium 90 is a radioactive isotope

@CardboardCreative 8 лет назад

omG NOT Sr90 !!! we'd ALL DIE

@Misty994 8 лет назад

How can this still apply to us if we eat a diet that is shipped from around the world?

@DubTurd 8 лет назад

That's why they are talking about anthropologists researching decayed, old, human bodies, not modern day humans.

@lather7785 8 лет назад

+Crash Bandicoot I was thinking the same thing. I think they just mean they can tell where people were from a fair amount of time ago, he just worded it badly.

@mohammadhijazi4498 8 лет назад

and the water you drink has it unless you drink imported water.

@edi9892 8 лет назад

+Crash Bandicoot Isotope analysis got also messed up by the nuclear tests and catastrophies.

@nitelite78 8 лет назад

Yeh they should have said the importing/exporting of food now makes it redundant. Still, really cool for historic research.

@CaptNSquared 8 лет назад

If you told me you could tell where I lived for the past 20 years I would be shocked. I'm only 16 after all.

@noahwilliams8996 8 лет назад

That is just the power of forensics :)

@luisandkristinebaez6332 7 лет назад

N Squared I'm act

@MelodySharp. 6 лет назад

Miao Music and her mom’s ovaries. Don’t forget half of her comes from her mom.

@StealthCoder967 5 лет назад

😂

@micaonyx5301 5 лет назад

Good one LMAO 😁

@jameswray50 8 лет назад

Strontium, the NSA's favorite element.

@Sc4r4byte 8 лет назад

+DaCamponTwee not for it's practicality, as our diet's food and water is so frequently imported but for the ideals that strontium has upholded.

@TheFishCostume 8 лет назад

+DaCamponTwee The NSA is the tooth fairy.

@Sc4r4byte 8 лет назад

+DaCamponTwee not for it's practicality, as our diet's food and water is so frequently imported but for the ideals that strontium has upholded.

@flubs2298 8 лет назад

+DaCamponTwee Big Brother is ripping.

@erkdoc5 8 лет назад

+DaCamponTwee It would probably be silicon. Why travel to pull out someone's teeth, when you can just tap everything and get all the information and more that the poor sap is posting online.

@LorrTube 8 лет назад

As an addendum to this, strontium is also stored in your hair too. And it will keep a constantly up-dating record of where you have been the last couple of months, depending on how much you let it grow. If you let it grow past your shoulders, your hair can store years of data about where in the world you moved.

@Cadam_ 8 лет назад

♫Crawl out through the fallout, baby When they drop that bomb Crawl out through the fallout With the greatest of aplomb When your white count's getting higher Hurry, don't delay I'll hold you close and kiss those Radiation burns away Crawl out through the fallout, baby To my loving arms Through the rain of Strontium 90 Think about your hero When you're at Ground Zero And crawl out through the fallout back to me Crawl out through the fallout, baby You know what I mean Crawl out through the fallout 'Cause they said this bomb was clean If you cannot find the way Just listen for my song I'll love you all your life Although that may not be too long Crawl out through the fallout, baby To my loving arms While those ICBM's keep us free When you hear me call out Baby, kick the wall out And crawl out through the fallout back to me 'Cause you'll be the only girl in the world Why don't you crawl out through the fallout back to me. ♫

@georgethomas267 8 лет назад

Yesssss Fallout ftw

@gabriel300010 8 лет назад

+Cameron Morr tell me the name of this song, I pay 50 caps

@Cadam_ 8 лет назад

gabriel ferraz The name is in the first line, Crawl Out Through The Fallout.

@gabriel300010 8 лет назад

Cameron Morr thanks dude

@SawtoothWaves 8 лет назад

This is so cool.

@ireallyhatemakingupnamesfo1758 8 лет назад

I'm just gonna go clear my strontium browser history

@millsbian2962 8 лет назад

This must be my favorite SciShow episode to date. SO COOL.

@crystalheart9 Год назад

Fascinating! Thank you.

@mariamysoul 3 года назад

Thanks ! Learnt something new.

@serenachristie566 8 лет назад

"Strontium man it knows where you been" LOL!

@SHIFTKICK 8 лет назад

Wow. That is extremely cool.

@zack4423 8 лет назад

Love this channel

@katiekawaii 8 лет назад

That was a great episode.

@ramosveronica32 8 лет назад

I heard of this in a 'Bones' episode; a teen who went missing when she was a little girl. She couldn't remember her life before the abductors. It gave them an area where she may have come from and there they researched missing kids files. Obviously the story isn't real, but it's cool to know they try to keep science as accurate as possible.

@General12th 8 лет назад

+Veronica Ramos (VeronicaR) Actually, that doesn't seem too unlikely. I bet this kind of situation really has happened.

@1829Emily 8 лет назад

Great info

@billyblackattacks 8 лет назад

i knew nothing of this until I watched an episode of blindspot. now Im seeing it everywhere

@Gribbo9999 7 лет назад

When I was 7 years old in 1957 there was an accidental release of radioactive materials from Windscale plant in Northern England about 200km from where I lived. At the time lots of milk was destroyed due to contamination with Strontium 90 realeased in the accident and we kids couldn't drink milk for a while. Strontium 90 has a half-life of 29 years. So if I did ingest any Strontium 90, there would be about 25% of it left by now in my teeth. A little bit scary when I think about it.

@Zeoxis6 8 лет назад

I love watching the scientific channels. I love learning all these different kinds of things, and it's so amazing that humans today can do this so quickly and easily, just like it's amazing that we've come far enough to be able to discover all these aspects of our universe and how it interacts with itself and we as humans interact with it. Just, mind blown man.

@ilikemusic2773 6 лет назад

Haha. Stront.

@kylebryancagasan4447 8 лет назад

I'll have my doctor inject strontium into my mouth so that the ratio will be off. *investigates teeth* "Based on the strontium ratio in his teeth, he seemed to have lived in....Mars..fair enough"

@thevegastan 7 лет назад

Michael always have a cheesy way to end or re-spice a part of every SciShow he hosts. Nice!

@Lexicommonzero 8 лет назад

Woot,shout out to my home town Cahokia

@SuperDuperPooperScooper4321 8 лет назад

Next year im writing to Strontium for Christmas

@PerpetratorOfTruth 8 лет назад

In Dutch the word 'stront' means shit. So strontium is always good for a chuckle.

@Feynstein100 8 лет назад

+Gluteus Illuminatus Holy stront.

@VicariousReality7 8 лет назад

+Gluteus Illuminatus funny.... in swedish strunt means nonsense

@PerpetratorOfTruth 8 лет назад

VicariousReality7 So the bull variety. :D

@Cannongabang 8 лет назад

it is actually the same in italian

@tizoro3 8 лет назад

whoop whoop

@sianmorris9655 3 года назад

lol. this is more useful than my reading list. my essay thanks you

@raikuthedragon3907 Год назад

I can’t believe that if I died, right now at 18, someone over a thousand years in the future could find out where I lived and the age I was when I lived there. Science man.

@VixonAzaria 7 лет назад

Rubidium!! She's a character in my book (Zodiac by Romana Russell) too!! Lol didn't realize it was on the periodic table!

@PinkChucky15 8 лет назад

That's pretty interesting :-)

@timhaldane7588 6 лет назад

I am watching this video on my 38th birthday.

@almostawalrus9970 8 лет назад

"What if I told you... there's a simple way to figure out every place you've lived for the past 20 years of your life..." *What if I told you* Michael is Morpheus confirmed.

@JLocke0113 2 года назад

I'm pretty sure threatening to pull my teeth out will get me to tell you where I've been in the past 20 years

@MatthewNJDavis 8 лет назад

Huh, I wasn't expecting that. So I suppose strontium is the element of surprise...

@llawilet845 8 лет назад

I looked at the thumbnail and at first I was like, "Hey there's the 1996 N64 controller"

@chestersnapdragonmcphistic579 8 лет назад

Let me have your teeth, I need to know where you've been. "I could just tell you." No! I need to do it this way!

@gunguy100 8 лет назад

Strontium:"I know where you live and lived" Me:"No, strontium please" Strontium:"Here comes the science belt" Me:STRONTIUM NO!

@StarlightJosh 3 года назад

❤️❤️

@radicalbacon 8 лет назад

Strontium won't tell me if Michael's growing out his blond streak.

@RainingArtillery 4 года назад

Strontium's phone: **Google wants to know your location**

@ZXRulezzz 8 лет назад

So maybe that's what Cinco does with all those teeth they're pulling out, sneaky data mining? :D

@dis_guy7 Месяц назад

i am going to ingest random strontium metal to confuse scientists

@vabese 8 лет назад

hey SciShow, its interesting to know that strontium allows you to do this... but what about re-mineralisation of the teeth, my dentist told me that the brown spots on my teeth were once weak spots in danger of becoming holes but instead took up new elements to reform, it would make sense for it to be a non-white colour considering the human body isn't picky on these cases, but would these spots distort any readings it gets or do they allow better results? now my teeth aren't fully brown(only 3 spots on my left molars) so you could easily use the normal method, but what is your say on this phenomena?

@rurutuM 8 лет назад

this was in an episode of Blindspot.

@Morpheuss 8 лет назад

The word 'stront' actually means 'shit' in Dutch :p

@ivancai9334 6 лет назад

morpheus1008 shitium???? XD

@BippSpango 8 лет назад

Not if i don't have teeth... thank science for Pepsi and dentures!

@finnishturtle3059 6 лет назад

So my teeth now where ive been that means im being stalked

@dyingangelo 8 лет назад

any update on the huge mammoth tusk found in Michigan?

@sundaystef 8 лет назад

Crawl out through the fallout

@rayhuckfield5517 8 лет назад

100 club!

@TheeMusicalARM 6 лет назад

If strontium is collected in the body after drinking water, wouldn't the information regarding where you lived differ for people who only drink bottled water? Or is it absorbed in the body through other means as well?

@UncommonEyes Год назад

There is most likely Sr90 in some of teeth due to living downwind of Hanford Reservation when I was 3 years old in 1946. Possibly fallout at other locations due to moving around as USAF brat. Wish someone would test a tooth I have that was removed by a difficult extraction by a careful, thoughtful dentist.

@SIC66SIC66 8 лет назад

I have a question. Sometimes when you have muscle aches, they feel really bumpy and full of small ridges, why is that?

@kuronosan 8 лет назад

A phaser flicks in a phaser flood.

@KaiCalimatinus 8 лет назад

Just to be pendantic, its the teeth that know where you've been by recording the strontium.

@alexandranastor6853 7 лет назад

If I recall correctly, this method was used on a young girl in an episode of Bones a few years ago :)

@kitty_gatoo 8 лет назад

He's so attractive. I get hyped when he's the one in the video, and he's smart?! Ugh so rare to find in a guy now a days.

@coryrichards7506 8 лет назад

If anyone is watching the show Blindspot, this came into play in one episode

@swsephy 8 лет назад

doot doot

@morezco 8 лет назад

I read "Strontium: it know when you were born" before clicking eh

@jamesconnelly1387 8 лет назад

I'm gonna totally mess up future scientists, I'm 13 but I still have 3 baby teeth and I only started growing wisdom teeth a few weeks ago

@MarshmallowMidgets Год назад

They will think I lived in the mountain dew factory

@NiramBG 8 лет назад

so, you're telling me Strontium knows what I did last summer? *shrugs*

@Zeldaschampion 8 лет назад

Crawl out from the Fallout....

@Exayevie 8 лет назад

Will this continue to be a reliable method in the future, as more food and even drinks are imported and exported?

@Miryr 8 лет назад

I would assume that this is no longer an accurate indicator, given that foodstuffs are often imported nowadays

@B4brenda 8 лет назад

Science is awesome!

@loganbailey5814 8 лет назад

completely unrelated fact some isotopes of strontium glows

@MichaelSHartman 8 лет назад

If Rubidium is radioactive and will continue to be so wherever it is then as it decays in the tooth would the ratio not change? I couldn't help but think about Chernobyl, Pripyat, Keiv downstream, and all those children to the west.

@mikejoseph6654 Месяц назад

Rubidium-87 has a half-life longer than the age of the universe. So only a few rubidium atoms will decay in your teeth during your lifetime, not any amount that we can measure.

@spore214 8 лет назад

strontium...*giggles in dutch*

@jk21ize 8 лет назад

How would this be affected in modern people living in places like the US, where our food and drink often come from entirely different places in the country / different countries?

@Chemanic1 Год назад

I’m so upset that I found this out after I was nine because I really want to eat a ton of strontium rich foods to confuse future anthropologists

@CreamAle 7 лет назад

skeletons can actually tell you where they have been if you ask.. granted that they're spooky and scary enough.

@DirtyGirlDubstep 8 лет назад

Given that we now get food from all over the world, I don't see that this will be as helpful for future anthropologists.

@gillianfisher752 8 лет назад

I'm missing nine adult teeth (including wisdom teeth). Good luck, anthropologists.

@atropa4931 8 лет назад

Strontium, knows you better than yourself and Google.

@AmatMN 8 лет назад

Strontium the ultimate stalker

@alexistzou7447 8 лет назад

i still dont understand how it knows where i have been.. i got some strontium in alaska and some in australia how can you tell?

@seatbelttruck 8 лет назад

So... would that work on modern humans? There's a lot of food importing/exporting that goes on, and wouldn't better access to dietary calcium mean less strontium in our teeth? Though he mentions water, which IS usually from sources pretty close to you. Unless you drink bottled water. But even then, you still get plenty of local water through cooking, ice, brushing teeth, washing food, etc. Also, most people get their wisdom teeth out, so the information from later childhood isn't happening.

@valseth95 8 лет назад

I have an exam tomorrow, and then I thought to myself: "What is better than watching SciShow?" Too bad my exam is about sound production instead of Strontium. That would be more intersesting :|

@madvic6083 8 лет назад

Osht..i'm scared now, i better clear my browser history.

@crankysmurf 8 лет назад

With importation of food from around the world, wouldn't measuring strontium be more difficult?

@Teebs131 8 лет назад

Wait, what if you only ate imported foods all your life, wouldn't the strontium in those foods affect your teeth and affect the results? Or does it have no effect?

@MyNameIsMaxYo 8 лет назад

+Teebs131 this method probably isnt used for modern people.

@TheRubberBandBandit 8 лет назад

Crawl out through the fallout...

@GOD2sodomyME 8 лет назад

if a person eats enough foods that have been shipped in to the area they live in, does this mess up the results?

@themadwriter 8 лет назад

This makes sense for skeletons prior to the 20th century, but how would this work for people who eat food that may not have been grown anywhere near where they live? I eat food today that comes from all over the world, in a 1000 years would this still be an accurate way of judging where a person is from considering how easily I'm able to obtain those foods from diverse locations?

@haosheng12 8 лет назад

So how would they know where you've actually been if you had a bunch of imported foods your entire life?

@cOmAtOrAn 8 лет назад

+Haosheng Xu Water generally doesn't come very far from the source to you. It would be more subtle, but still measurable.

@RobKinneySouthpaw 8 лет назад

With the globalization of the food and water supply, will this technique get messed up with a lot of Strontium noise? Or will it accurately reflect globalization. In some future century " this skeleton shows a strontium signature consistent with 18 different geological areas; clearly they were wealthy enough to eat a lot of imported food. That, or they moved countries every year because of work."

@dm_nimbus 8 лет назад

Strontium knows what you did last summer

@Aleblanco1987 8 лет назад

And what about toothpastes with strontium (to treat sensitivity)?, wouldn't that spoil your results?

@gonetea4081 8 лет назад

Santa be like

@zirconcrystal1869 8 лет назад

Wait it's through your diet? Well what about eating imported food? Or like food that were grown in places with different strontium ratio.

@KnakuanaRka 5 лет назад

One thing you should have mentioned: the exporting of food and water all over the globe has made this analysis technique essentially obsolete in modern times. You did make a joke about extracting a living person’s teeth, but didn’t mention that it wouldn’t work even on a recently dead person.

@JamesPetts 8 лет назад

What about people who used toothpaste containing strontium acetate, as I did for many years?

@Blackmeteor 8 лет назад

What happens in today's age when we're eating Bananas from Ecuador, Potatoes from Australia, Corn from the U.S.A, Bacon from Canada, Rice from China etc... ?