World's Roundest Object!

The world's roundest object helps solve the longest running problem in measurement -- how to define the kilogram.
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A kilogram isn't what it used to be. Literally. The original name for it was the 'grave', proposed in 1793 but it fell victim to the French Revolution like its creator, Lavoisier. So begins the tale of the most unusual SI unit. The kilogram is the only base unit with a prefix in its name, and the only one still defined by a physical artifact, the international prototype kilogram or IPK.
But the problem with this definition has long been apparent. The IPK doesn't seem to maintain its mass compared to 40 similar cylinders minted at the same time. The goal is therefore to eliminate the kilogram's dependence on a physical object. Two main approaches are being considered to achieve this end: the Avogadro Project and the Watt Balance.
The Avogadro project aims to redefine Avogadro's constant (currently defined by the kilogram -- the number of atoms in 12 g of carbon-12) and reverse the relationship so that the kilogram is precisely specified by Avogadro's constant. This method required creating the most perfect sphere on Earth. It is made out of a single crystal of silicon 28 atoms. By carefully measuring the diameter, the volume can be precisely specified. Since the atom spacing of silicon is well known, the number of atoms in a sphere can be accurately calculated. This allows for a very precise determination of Avogadro's constant.
Special thanks to Katie Green, Dr. David Farrant, the CSIRO, and the National Measurment Institute for their help. Thanks also to Nessy Hill for filming and reviewing earlier drafts of this video.
There is debate as to whether this is truly the roundest object ever created. The Gravity Probe-B rotors are also spherical with very low tolerances such that they may in fact be rounder.
Music by Kevin McLeod (incompetech.com) Decision, Danse Macabre, Scissors

[@RealSanChaeZ]

If you are curious - there was a redefinition of SI units in 2019 and the kilogram is now defined by Plank constant.

[@vizlermate]

Thank you, was looking for this.

[@TheWanderingYogi]

Thank you, I was wondering about that

[@manavmodi7331]

Thanks man

[@dhooth]

Thank you man, I was looking for that

[@prithiviraj3070]

that is some valuable information

[@blanks-]

Guy: *drops it* Scientists: "I guess it's time to donate your body to science."

[@joshyfernandes]

It's priceless anyway lmao

[@kilokrow4400]

"We'll make something *P E R F E C T* out of it."

[@godelemender8009]

Hippity hoppity your life is now our property

[@trivoo521]

BWAHAHAHAAAHHHAAAA

[@bosstrac8989]

Guy: drops it Scientist: 1:32

[@ant7155]

The tension between them is crazy

[@suicideistheanswer369]

Can't blame her

[@HELLOTHERE_12345]

Why

[@otistik862]

YES omg i was looking for somebody to say this thanks

[@davidwiederman8841]

Ty!! I was wondering if I was crazy.

[@Planck944]

I dont see it. Why do you think so?

[@alansaal1]

10:00 >Listening along doing stuff: >"as early as 2014" >Checks date >Time flies bois

[@LucianFisher-jj2em]

2024 era

[@RomanKniga]

@LucianFisher wtf what is the posability

[@arbybruce]

Time flies so much that the kilogram has already been redefined

[@LucianFisher-jj2em]

@@arbybruce YESS WE DID ITTT

[@framerate1494]

Time has flown even more bois

[@umar5685]

1998: World's Strongest Man 2013: World's Roundest Object 2030: World's Flattest Flat-Earther 2050: World's Most Human Human

[@monke_yyo]

lol, i agree we just growing more inhuman

[@3rm1n91]

We already have most human human its jerryrigeverything the default human

[@punkisinthedetails1470]

more human than human

[@ulto6000]

2020 COVID-19*

[@Hubert_Cumberdale_]

2100: World's last human

[@gallaxii5436]

*just holds a ball* “It feels absolutely incredible”

[@no_one866]

-_-

[@yinyang1217]

@@no_one866 sIGH iM aN iDioT i cOMmEnt -____-_-__-____-_--- iM sO cOOl

[@hhfbko]

Deez nuts

[@andreewseymour314]

@@yinyang1217 no one finds you funny

[@no_one866]

Yin Yang what’s wrong with commenting -_-

[@dertiarthe]

never thought that a simple video of how round a ball is would give me so much information about so many things I never knew that existed. amazing.

[@veenmikki27]

Yeah like I had no idea a pound was a derivation of a kilogram

[@Cityplace2711]

I always wondered why SI units were not called IS units… until now. Thank you for that among the many fascinating pieces of information here!

[@igoranisimov6549]

I think it comes from French

[@Cityplace2711]

@@igoranisimov6549 that's exactly right (adjectives after nouns by default)

[@josephsylve6758]

Système International en Français

[@pedrojorge1912]

Really, have you never even suspected? OMG, the guy has discovered that science doesn't necessarily revolve around English.

[@brandoncooper7984]

Scientists: The more wrinkles your brain has, the smarter you are. My Brain:

[@shawncrisologo6042]

Smooth

[@mightypurplelicious3209]

Round

[@Bruh-vd1pp]

s m o o t h

[@settonsai5570]

You try being a smartass and you sound like a smooth brain

[@Ky-wh5se]

No brain no pain.

[@tadeasgubala7576]

Government: What did you do with the millions we gave you? Scientists: *sfeer*

[@OliLego]

Yes

[@cradams1834]

68

[@cradams1834]

Now 69

[@OliLego]

@@cradams1834 nice

[@award4531]

Sphere *

[@sarahmcbeth9156]

I think the chemistry between you two is more perfect than the physics of that object

[@2btpatch]

This video, as of September 2022, is nine years old. I find the content fresh and fascinating. The locations add an extra dimension of visual interest that keeps the watcher invested in the video. You are a great presenter of scientific information, Derek.

[@whoistylerdurden1652]

Scientist: its priceless Rick from pawnstars: il give you 5 bucks, im taking all the risk here

[@randomcentral0766]

Best I can do is 62 cents and an expired gift card

[@AwsibThapa]

Hahahaha

[@qwer-ir8nx]

Hahahahahhhhhhh lmao

[@mohammedistiaqhossain2476]

hahaha!!! Good one. XD

[@killerdinamo08]

Yeah, it's not even made out of metal​, just looks shiny...

[@super_5402]

it doesn’t even look like it’s moving when he moves it with his hand

[@chamo7756]

Super _ it reminded me of that one magic ball that was in tv commercials like in 2011

[@jayzee5712]

fushigi

[@williammacintosh738]

fushigi lookin ass

[@mcj0014]

Super _ oh god that’s trippy

[@Astrobrant2]

Yes, I made a comment to that same point. It's easy to imagine the sphere is not rotating and his hand is just sliding around it.

[@kevincai6337]

4:36 We do a little bit of trolling...

[@windowsxpmemesandstufflol]

Admins changed the system to prevent trolling :(

[@Neuro_nActivation]

​@@windowsxpmemesandstufflolchange the admins then

[@march11stoneytony]

This brings back good memories. Watch this during a good period in my life, and I'm kind of repeating that period right now

[@spudboi2901]

Flat earthers during this video: ‘Sorry, is there something there, I can’t see it’

[@amitfihman7342]

😂

[@slobiden.2593]

Amit F we see a circle

[@ramen_is_life9942]

Kael Dowton 69 likes nice

[@ViratKohli-jj3wj]

@@slobiden.2593 gay

[@bungiecrimes7247]

Omg you just trolled a libtard lollololililoooliloloooollolol xddxdxd XD lollso epic super epi. Epic for the win 👌👌👌👌👌🤣🤣

[@banana_in_a_tuxedo]

the roll of tape when I'm trying to find the seam be like:

[@pancakes8101]

LMAO

[@Egerit100]

Except it's not the world's roundest ball it's the world's roundest cylinder

[@splat6355]

OMG AGENT PEELY AND MANCAKE FROM FORTNITE YAY BIIIIIIG FAAANNNN OMGOMOMGOMGOMGOM SHEEEEEEESH SHEEEEESH IM GETTING RIPPED TONIGHT RIP THAT EYYYYY OMGOMGOMG

[@pancakes8101]

@@splat6355 wut

[@splat6355]

@@pancakes8101 OMGOMGOMG MR MANCAKE IM A BIG FAN I CANT BELIEVE YOU REPLIED TO MY COMMENT OMG OMG GOSH I MISS BUTTER BARN CAN YOU SING BUTTER BARN THEME 😁😁😁😁😁😁🥰🥰🥰🥰🥰😱😱😱😱😱😱😱😱😳😳😳🤯🤯🤯🤯🤯🤩🤩🤩🤩🥞🥞🥞🥞🥞🥞🥞🥞🥞🥞🥞🥞

[@listerdave1240]

If I'm not mistaken the gyroscopes used in the Gravity Probe B experiment were even more accurate. I remember the sphericity when described using the Earth analogy said that the difference between the tallest peak and deepest valley would be about the height of a person. Four of them were made for the satellite. They are still in space but probably no longer as round as they used to be as they will have eventually spun down and hit the sides of the gyroscope housing as the satellite eventually lost power and helium. I'm guessing though that there might exist one or more 'flight spares'.

[@jt3781]

Correct, this sphere is actually in 3rd place, with the size analogy for the GP-B spheres being 2.4 meters, (a little bit less than 8') vs this difference of 14 meters, (slightly less than 46'). But hey, let the French have their moment.

[@belugathevi9296]

Fun fact : The *Le Grand K* was replaced by a new definition of the kilogram based on plank constant. Which literally means that kilogram got a new definition in 2019.

[@ie3410]

imagine if she was pranking him all along into thinking that it is the roundest when it's only a 10$ regular metal ball and she said it right after he went "it feels absolutely incredible"

[@dallascricket8532]

...and boom! Found the nexus event that caused the multiverse.

[@lumo5515]

@@dallascricket8532 you watch too much marvel

[@Non-Legit]

@@lumo5515 you understood the reference so you do too

[@CadillacDriver]

@@lumo5515 you just got served.

[@captainelliot8767]

@@Non-Legit he understood that reference 😉

[@nj8833]

3:38 update: in November 2018, the kilogram was finally redefined using Planck’s constant. It was the last base unit to be redefined using natural constants

[@irishshawn3310]

That's when the world goes round, and we just stay still, like a plank!

[@randomcat5262]

i can't tell if this is insignificant or groundbreaking

[@passingshadow8934]

@@randomcat5262 Both.

[@calvinhunt81]

@@irishshawn3310 if this is a reference to that Impractical Jokers episode, then well done 😂

[@irishshawn3310]

@@calvinhunt81 Couldn't help it!

[@peterfconley]

I have always wondered why the kg is a base unit with is prefix. Thank you so much, I can stop wondering.

[@jakesetnikvox2106]

Can’t believe it’s been ten years since you did that video now. Time flies

[@ZicajosProductions]

0:38 You know it is really round when you can't even tell the sphere is being rotated!!!

[@Repented008]

Yeah dude! That's pretty awesome.

[@ZicajosProductions]

I wonder what the world's flattest object/surface is.

[@Repented008]

Joe N. Donald Trump's hair.

[@ZicajosProductions]

EvilBonesMan_666 hahaha

[@Repented008]

Joe N. Couldn't resist. lol.

[@samantha8701]

I dont know, when i was 10 i made a pretty darn round snowball

[@chocolatte9466]

Samantha LMAO 😂

[@chickennuggetstrong8537]

🤭🤭

[@davo7512]

Not as round as mine

[@muzanjackson5779]

mines rounder

[@davo7512]

I GotNoLuck nah

[@D3FA1T1]

he's holding a cubemap

[@sierpinskibrot]

Lmaoo

[@mayochupenjoyer]

these videos are so consistently good that i didn’t notice this was 11 years old

[@bradenkemmerer8636]

But will it blend?

[@MisterMapito]

Best comment ever

[@Ithykins]

+Declan Harrop sphere smoke dont breath this.....

[@Ithykins]

+Declan Harrop sphere smoke dont breath this.....

[@chezberger994]

Nu

[@egg2199]

Will it cereal?

[@veobro1456]

When you take the Japanese foil ball challenge too seriously

[@ice-cold_3469]

lolf

[@jesuschristiscallingyou953]

Hahaha. That's really funny! God bless!

[@ot_hero7165]

6ßY7 a 3477t747r😠😈😢😇😢😠😢 I 😤😤

[@ot_hero7165]

Gyuu upcoming bi hyyyuuulkiiugfy💚💛💚💜💜💛💚💛💚💚👾❤👀💜👂👃💕🎱🎱💯🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎱🎣🎣🎣🎣🎽🚽xoodldlllelelrlrk3ledk🛀I f🛀🛀🛀🛀cccccI9PDPOO R OFKFKFKJRJI2 r ifi i phonological l

[@abigailffff]

Lol

[@zeyadalabdaly3393]

I think that this is hand down one of the best veritasium videos and one of the best educational videos on this platform.

[@HyperStuds]

"this, you're looking at now... is the roundest object in the world!" my balls would say otherwise

[@pedrojorge1912]

Let's check it then, bro.

[@HyperStuds]

@@pedrojorge1912 aight bet *proceeds to unzip pants*

[@gway7247]

Aliens with high-tech things: *And what did you reach, humans?* Humans: *The roundest sphere.*

[@jouhanehajali3564]

Hahaaha U are soo homer 🤣

[@heposlis2409]

Still better than nukes and weapons

[@starstencahl8985]

@@heposlis2409 If they're truly advanced, they'd actually appreciate the scientific efforts

[@villagernumber7882]

Aliens: *is it possible to learn this kind of power*

[@MaFia_1Q]

Why do we always see aliens more advanced than us? Why do we not see that we are more developed than them?

[@timsolomonov]

“We gave you a million euros, what did you do with it all?” Scientists: *s f e r*

[@static7985]

s f e e r

[@georgemavroforos6958]

Helf

[@Tenite]

Stolen

[@Shane-ds6qj]

@@Tenite s f e e r

[@kennyyy9693]

Rond

[@bradlfsh]

This is one of my favorite KZbin videos ever. Something about understanding what a "unit" is fundamentally just made me think differently

[@ryanforgo3500]

It kinda feels weird though. On one hand i don't see the exact need in this day and age for the physical object in france to still be what it is. maybe because we grew up learning the weights as numbers.

[@bradlfsh]

@@ryanforgo3500 it is kinda redundant noone ever needs that level of accuracy but I suppose it needs to be defined somehow. The more precise you can make the definition the less error you get from equipment. I think the point of it being so round is to do away with the physical object. They can calculate how many atoms are in the sphere and then say a Kg is the mass of this many atoms. Which will always be true

[@bradlfsh]

@@ryanforgo3500 if your a company making bathroom scales it can be helpful. Your rival company will be basing their measurement off the same thing as you are.

[@vladreushev6566]

Thank you for the video!

[@fartsimpson8610]

TEACHER: "Draw me a perfect circle..." ME: "Give me a $million first!"

[@rajarajanramadoss6332]

lmao underrated

[@brainloading5543]

Upperrated

[@cowslave308]

@@brainloading5543 overrated*

[@brainloading5543]

@@cowslave308 evenrated

[@kolpkii]

@@brainloading5543 highrated

[@anotherstupidfeature]

If two such spheres touch each other, how big is the touching area?

[@slmbd-m4nyboth4nsdied52]

Ram Page technically they aren't touching. Check out Vsauce video on "touching."

[@TonTheHungry]

If they actually touched the area of contact would be 1 atom, that is assuming the spheres are perfectly round.

[@slmbd-m4nyboth4nsdied52]

Ton even then, it would be their electrons interacting. Their nucleus wouldn't touch.

[@xajovanela]

Yeah, if they were perfectly round and touched it would be 1 atom.

[@slmbd-m4nyboth4nsdied52]

David even then not 1 atom. The atom's electrons on the respective spheres would interact but never physically tough each other. The nucleus nor the electrons.

[@Fryzzi]

I just wanted to say: „damn I now need an update to this" then I saw your "new" Video about this Topic. Hell yeaha!

[@andrewjeffries9849]

9 years on and the International Prototype Kilogram has since been replaced by a kilogram based on physical constants, but such a cool video!

[@botelladeaguamediollena4885]

This whole video was just a coverup for the actual roundest object on earth. Which is that clock at 2:22

[@kasm8863]

bruh moment

[@khqlifq]

Painfully unfunny

[@darkrider897]

Underated comment

[@markfritzel5993]

Wow you roasted that clock. It had it coming though.

[@silashinton6873]

They should have used the kilogram as a stencil for it

[@olukanyinsola]

*drops ball* "oops, Can you make it again my hand slipped"

[@gregheffley5712]

reading this makes me die inside

[@berndheiden7630]

I actually held my breath when he picked it up with one hand and screamed in my mind: „Where is the other glove? For God‘s sake just have the other hand ready if it slips!“

[@2chill2bbored72]

@@tanyasolova8544 BOT ALERT BOT ALERT THIS IS NOT A TEST BOT ALERT BOT ALERT

[@retrad5135]

B r u h

[@koushik5437]

This is cool and crazy concept at the same time...!

[@Andrestbh]

the fact how much this thing could roll just goes to show how shiny it is

[@netherwolf1003]

"Omg big K changed weight!" "Whats it's weight now?" "A kilogram."

[@bytheseaaspirinshop801]

Precisely. It could be argued that the Big K remained the same and everything else became more massive. Since every object on earth is being bombarded with cosmic radiation, every object on earth could gain mass over time. If the big K were partially protected from radiation, it would gain less mass, and therefore appear to have less mass. All is relative. I i

[@safari.luv_DD]

More like a 1kilogram and increase to onekilogramm and fingerprint

[@trojan9838]

Since it is measured using fixed units . How does it matter ?

[@circuit10]

By The Sea Aspirin Shop I don’t think that weight works like that

[@averyshaham1697]

not anymore

[@thatoneguy7451]

Mojang: “The snow is now snowier!” This: “The sphere is now spherier!”

[@valentinodavanzo6514]

Ah yes the floor here is *now floorier*

[@Kuu-n-koi2317]

true intellectuals

[@grg.leonte]

The grass is greener

[@josephpostma1787]

the super is superior

[@thatoneguy7451]

We are all intellectuals here.

[@acres41]

Just stumbled upon this video again because of KZbin shorts, turns out to be exactly 10 years ago when it came out. Wow, time flies.

[@nugboy420]

I remember watching this but he short brought me back to see more

[@capcadoi]

They are flirting...so bad

[@kingcrimson234]

Capcatrei I noticed that, too.

[@mogur00]

Capcatrei yeh she clearly wanted his rod in her sphere

[@capcadoi]

mogur00 =)))

[@junglejim3739]

Why always man think like that. While woman just want to be friendly. So woman must be cold and unfriendly?

[@capcadoi]

ausieking =)))

[@senorlechuga8832]

- Hey government can we get 1M euros for science research? - Science research? - Yes *Actually makes sphere like a boss*

[@shoelicker]

Speech 100

[@coreforce9872]

sphere time

[@wystrix439]

I completely forgot about this format

[@someonerandom704]

if you asked the US: "Sure but you gotta find a way to turn it into a nuke."

[@neonix761]

@@shoelicker wdym, do you know the meme format?

[@issacwasabi]

i saw this and was like yay a new veritasium video! and than i got to the end and i realized that this was 10 years ago

[@Noowai]

The first time physics caused goose bumps on me. The moment you were talking about redefining Avogadro. Just wow

[@Noowai]

God damn, that's an old video, just realized that.

[@safian1232]

When he rotates it, it doesn’t even look like its moving

[@sparklyjello5405]

You have 69 likes...sorry mate I can’t ruin it....

[@safian1232]

@@sparklyjello5405 well its at 70 now so um yh, i guess it true what they say, good things dont last forever

[@sparklyjello5405]

@@safian1232 NOOOOO SOMEONE MESSED IT UP NOW THEY MUST PAY FOR IT AAAAAAA

[@safian1232]

@@sparklyjello5405 i mean we could reach 420

[@foty8679]

@@safian1232 420?

[@Queeze101]

A shiny ball has more value than my life

[@buddhabrew]

It's priceless lol

[@bernhardm.3118]

Horus Osiris yeah which means something soo valuable and important that its price cannot be determined

[@bernhardm.3118]

***** not really

[@smot-poker]

g aww

[@buddhabrew]

Cbnm 91201 haha :p

[@FutureAIDev2015]

11:42 "from cradle to grav" that was clever!

[@dummyslime7893]

"Hey we have a million Euros to blow, what should we use it f-" *"World's Balliest Ball."*

[@Joey_ott]

just googled it the definition of the kg will be redefined in 2018

[@eriche95]

.

[@Lalipox]

+

[@CC-jy4gr]

WE"RE ALL GONNA DIE!

[@sooyasos1914]

@@CC-jy4gr wait, did u forsee something?

[@samuraijosh1595]

@@sooyasos1914 Damn, I got get goosebumps reading that.. That guy really warned us XD

[@kevinli256]

The fact that the reflection does not even change when we rotate this thing precisely shows how round it is. This is just totally isotropic.

[@DekuStickGamer]

What does isotropic mean?

[@G.A.C_Preserve]

@@Aunos1 China?

[@mrtrashftb7657]

@@Aunos1 having a physical property which has the same value when measured in different directions.

[@DekuStickGamer]

@@mrtrashftb7657 ah, thanks. aunos was being sarcastic and negative.

[@Gw0wvl]

@@DekuStickGamer we use Isotropic in antenna modeling 👍

[@Brave_Sir_Robin]

7:00 I completely forgot that was even in the video by this point😂

[@hyunjinnieislove]

holding a ball: “it feels actually incredible”

[@sarbanibandyopadhyay9543]

For those who missed it........Le Grand K is no longer the actual kilogram. Now it is defined using the Planck constant and the new definition took effect on 20 May 2019.

[@Sheenifier]

So what happened to le grand k

[@belugathevi9296]

@@Sheenifier it is kept in a vault in paris but it's no longer the definition of kilogram

[@Sheenifier]

@@belugathevi9296 no but I want to know like if they tossed it or put it in a museum bc right now it's just a historical paperweight

[@belugathevi9296]

@@Sheenifier just a historical paperweight not only kilogram 3 other quantities definition were also changed

[@YSFmemories]

so the 1 million dollar ball is pointless?

[@Hamburbur101]

Imagine if a guy runs out of nowhere with sandpaper and attacks the ball

[@xian5087]

Rip

[@lemonoriaki7996]

LMFAO

[@Hamburbur101]

Grind to a dust

[@Worldastic]

More Interesting Than Raiding *Area 51* Tho....

[@trevorrogers95]

I would blame you for giving him the idea! Lol 😂

[@rlc7766]

For anyone wondering when he started to explain the grave the song being played is dance macabre

[@ghost-wl3pm]

was watching this and when he said "as early as 2014" i was really shocked definitely need an update or something

[@suedohnim8019]

In November 2018, the international scientific community voted to redefine the kilogram, affixing it to the Planck constant, a fundamental concept in quantum mechanics that will not change anywhere in the universe. The new standard went into effect May 20, 2019.

[@ghost-wl3pm]

@@suedohnim8019 that's really interesting, thank you so much for the info!!

[@poopypooper2146]

Veritasium: *“This is the world's roundest object!“* Strange crafting channels on KZbin: *“Hold my DIY aluminium foil ball.“*

[@Ray-ks4bb]

@BradynLee09 i agree with you wholeheartedly

[@anuj2991]

@Memes shorts beluwuga?

[@ruler8315]

@BradynLee09 thats a lot of come

[@anuj2991]

@Memes shorts well that was a quick reply lol

[@johnpetrakis379]

Don't forget your tin foil hat

[@kookie9538]

Kilogram has just be redefined as of today, may 20th 2019.

[@speedys.6545]

Thanks for that

[@aaronexists4308]

Cool!

[@durjam3734]

!looC

[@fictitiouselements6094]

They didn't use the sphere boys

[@MikkaPower]

What did they use?

[@craffte]

Looking at that feels like painting with sable. I would love to paint that.

[@GamingWithNoahYT]

This is one of the first YT videos I ever watched.

[@wbdharris]

Anyone else get nervous with his hand movement around the ball?

[@lacroix9407]

usually I am not really nervous when I touch mines.

[@terrsus7676]

@@lacroix9407 lol

[@Rich-hy2ey]

Not like he was Louis Slotin

[@smugasfuck7409]

I just realized that this was 7 while years ago. Wth

[@peggyfrench5275]

it doesn’t even look like it’s moving when he moves it with his hand

[@michaelfile4363]

True

[@josiahstephenpaul5753]

@@peggyfrench5275 true

[@josiahstephenpaul5753]

Same here😂

[@antonipolski9569]

Me

[@Banan4-Split]

The sound when the locks came in was giving me chills

[@rotorrant5867]

FYI the spheres in gravity probe B are 3 times rounder! Would love to see you do an update to this video. Was still great video, my kids loved it!

[@thomasparisi5333]

Hey, I have one of those spheres! A friend of mine at lockheed (Jeff ! ) gave me one of the leftover prototypes. It' a shame it's not worth a million :(

[@brycepeters6163]

I'd laugh my Ass off if he Dropped it

[@jonathanvtorp]

+Sean Bishop lol

[@gordonlim2322]

Seems like something conan would do.

[@ultraag8]

something Linus from Linus Tech Tips would do

[@adc6698]

Sean Bishop not a haiku

[@ll_extremelystressed_ll3804]

Bryce Peters same, lmfao.

[@Tob-hl4ru]

"You can't have a unit which changes its value" Central banks: "hold my beer"

[@DarkRoninX]

Underrated

[@vipneat7265]

Hold my money printer

[@Klaasvaak999]

hahaha spot on

[@spareaccount5270]

the likes are 669.... im sorry i cant like it mate

[@ttry1152]

Fiat currencies be like. Allow me to introduce myself

[@ChadKakashi]

This entire video felt like we’re cracking the code of reality.

[@TinCanTap]

my brain whilst the information stated in your neural links video slides right over it

[@naka8899]

*he is not holding the sphere the sphere is holding him*

[@yariv8961]

The sphere is not Zlatan

[@MemeLord-nu8mi]

James Kim lmao

[@MisterRorschach90]

We are rotating around the sphere because it’s so round.

[@neitherlink6612]

What is this, Rusia?

[@JavaJake123]

James Kim looooooooooooooooooooool

[@gmddeathangel3008]

The roundest object in the world is Vsauce's head.

[@theorigami3685]

GMD DeathAngel his name is Michael you disrespectful worthless pile of flesh

[@frijolero6976]

The Origami damn chill

[@vedadtr3509]

I dont get it why

[@HamzaKhan-bg9fh]

Anoniem no it's just cuz his bald head is round lol

[@rareracecar]

yes

[@cameronbottolfson9587]

For a video from 2013, this is amazing!

[@kirklorange]

I used to live in a house directly behind Derek's head in the first shots of him in the cemetery, which is the Waverly Cemetery in the Eastern Suburbs of Sydney, Australia.

[@DaggerXIV]

But can you turn it inside out?

[@modvind]

Oh I remeber that video. It got recommended for some reason

[@Verko_A]

yeah me too

[@alfiewxm]

no joke i just watched that vid and this was recommended XD

[@8bitarmory846]

that video is how I got here in the first place XD

[@Dee-jp7ek]

Shinji Ikari I think the name was 'How to theoretically turn a sphere inside out' or somthing similar, its a very interesting two part video.

[@justinx1898]

Government: “here’s a million dollars” **later** “So what’d you do with it?” Scientists: *b a l l*

[@muchotexto4248]

"We're having a ball"

[@Subt0nix]

better than what the american government does with 1 million dollars

[@anirudh2000]

@@muchotexto4248 10:11 you must have meant a pair of them, right?

[@Mike-vo2rp]

@@Subt0nixsays a weeb Your opinion doesn't matter

[@definitelynotcrazyrei3890]

@@Mike-vo2rp NASA: Here you go Lockheed Martin, finish our $327.6M Mars Climate Orbiter. Lockheed Martin: Yeah, Imma just burn this over this here red planet NASA: You expect us to pay you for this? Lockheed Martin: Pretty please?

[@kimbersal1]

Every time I watch your videos, my brain gets a little bit more wrinkly. Thank you

[@jimmyc451]

The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015×10 when expressed in the unit J⋅s, which is equal to kg⋅m⋅s, where the metre and the second are defined in terms of c and Δ.

[@a.e.i2409]

Me watching this trying to act smart like I understand this: *hmmm yes, the kilogram is made of kilogram.*

[@manuelmoscardi6606]

P.s. the kilogram isn't anymore that platinum-iridium stuff

[@hypothalapotamus5293]

Standards lab scientist: Ah... Remember the good old days when the kilogram was defined as the weight of a chunk of platinum-iridium and they were trying to define it as the weight of a silicon sphere? Normal person: No. Standards lab scientist: Well, that was roughly a year and 4 months ago. Now they define the kilogram based on Planck's constant, the second, and the meter.

[@kylej0474]

Kilograms suck, just use pounds it is 10 times better

[@shatzielwood1906]

this had no right making me laugh that hard

[@martindiaz4507]

Lol

[@zacharyb5701]

Are we not going to talk about how much chemistry those two had at the beginning of this video!?

[@bendydrecher772]

i feel like they’re just being nerdy scientists getting giddy over the scientific marvel

[@justabirb5015]

To save y’all the search- the kilogram was redefined according to Planck’s constant in May 2019

[@noahreischmann64]

I think one of the coolest things about this is when he’s moving it around at 0:34 and the reflection doesn’t change

[@MegaPopelboy]

This! Something about that scene had boggled me without knowing what it was. Nice catch

[@NotPicchu]

I thought I was tripping tbh

[@manjuathul103]

Yes

[@riteshnayak3398]

@Latin Games A less round object would distort the reflection as it is turned

[@Viewable11]

@Meme Kong If the surface is *not* a perfectly symmetrical sphere, the reflection by the surface changes depending on from which direction you look at it.

[@POOFAYMANN]

Him saying "they may redefine the kilogram as early as 2014" has me feeling ancient bruh

[@ges105sb6]

Same bruh

[@hussam9044]

bruhh

[@jklbob796]

It caused confusion

[@--Nyx-]

same dude

[@nebulousisgod]

It was only 7 years ago. How old are you, 10?

[@Frankenstein-1]

Crazy price for a lawn ornament.

[@yeetub]

roblox flood rush memories kicking back in: 0:46

[@speedydounut2316]

I recognized it too, it was a great game

[@pigdot]

i thought the worlds roundest object was your mom xDDDDDD This joke was sponsored by 9gag.

[@ButoPulseGames]

Pig.avi rly

[@diegovillalon1404]

Pig.avi not dissapointed

[@woohoonetwork8920]

I wish that youtube had gif comments

[@vialle7851]

DSoTM Nice attitude

[@woohoonetwork8920]

i.memeful.com/media/post/ZMav7vR_700wa_0.gif

[@sokisoko_]

man I did not expect this whole lesson but now I know a a whole lot about the kilogram

[@butwhowasmoto2739]

This is now outdated. The kg is been finally redefined in terms of non-arbitrary SI means

You can become the next cocaine kingpin

[@vexja5347]

It's too bad the video didn't teach how many "a(s)" repeated in a sentence. 😂 Just Banter.

[@uncleriefcase1425]

A a

[@KiiXii]

If it was the size of earth scratching it would create a hole that big it would create a pit so deep if you fell into it with a parachute you would be falling for 6 minutes.

[@KiiXii]

Or more

[@iiredeyeiiredeye1569]

So cool. She mentions the peaks a troughs scaled up to the size of the earth...but what are they on the actual sphere?, and what id the surface finish measured to? I work in engineering and normally the highest level of surface finish requirements I see is RA 0.2

[@MarcoLongoMusic]

4:38 --> reflections of the green screen make the kilogram transparent

[@UtkarshKaushik]

yes. only the top.

[@kelicity5454]

0.0

[@giodarsa]

+Marco Longo well noticed :)

[@MathyosSarkiss]

+Marco Longo lol

[@dogethesupermeme5245]

xD

[@zimmy3953]

69420

[@mobbob4012]

Omg lol

[@frostedturtle6951]

Can i have a job at dunder mifflen

[@zimmy3953]

Frostedturtle69 you got sour cream

[@tyciceestreams6679]

There has b en a murder i do declare

[@frostedturtle6951]

@@zimmy3953 i got sour cream(if this is from a episode i forgot it)

[@Tjousk]

Worth a re-watch

[@itslitstudios398]

I remmeber seeing this fOREVER AGO and its made its way back to me a decade later. I want to tOUCHHHHH

[@fartwrangler]

Is it time for this object to meet the 100-ton hydraulic press?

[@mythoughts6099]

That would be an interesting battle

[@dannybostain4364]

fartwrangler somehow I would cringe yet still be satisfied

[@stolenname94]

*PTSD*

[@johanness3850]

@@mythoughts6099 not really, the ball maybe very hard, but not very durable, silicon is about as durable as glass, so no. not a battle.

[@mythoughts6099]

Johannes S you’re too invested into something that’s not that deep