Birt 22 ágú 2017
Knowledge is power! Even if that knowledge causes you to rethink some of those lovely summer memories.
FREE Audio Book-
A review of all the books I've listened to recently:

Lindsay's Papers:
Professor Blatchley's Papers:

0:11- Ceral Killa- Blue Wednesday -
2:53- Berlin- Andrew Applepie-
3:40- Devil in Disguise- Danijel Zambo-
9:01- Q- Blue Wednesday -
11:08- Too Happy to be cool by Notebreak-

Summary: I visited Lindsay Blackstock at the University of Alberta to learn about her ingenious method for measuring the amount of pee in a pool by looking at the concentration of an artificial sweetener called Acefulfame Potassium. We looked at some samples from some pools in my area to determine how much pee was in them and I conducted an experiment of my own to see what was the cause of that "classic pool smell". I also presented average amounts of pee in large pools as well as an equation to determine how much pee is in your own pool.

I make videos like this once a month all year long while supplies last:
FACEBOOK: MarkRoberISchats
TWITTER: #!/MarkRober
INSTAGRAM: markrober


  • The pool smell reality has me a little grossed out.

  • someone in this comment section pees in the pool

  • I absolutely really don’t wanna swim

  • if u smell it don't go in it

  • Gros

  • How to solve this: put toilet water in the pool

  • Pool pee or pee pool

  • *All those dislikes are from people who pee in the pool*

  • i do pee

  • wat

  • “Looks at title and shuts tab”

  • Omg we like tim hortons super funny omg

  • That Starbucks > Tim Hortons transition was great lol

  • Wait it’s all pee *points gun* Always has been

  • i pee in the pool

  • When he was holding the cup of pool water Tbh i thought he was gonna drink it I mean, it was in a cup, in his hand

  • He is right it is sterile

  • I accidentally swallow probably 3 Cups of water every time I swim 🤮🤮🤮🤢🤢🤢🤮🤮🤮🤢🤢🤢🤮🤮🤮

  • was wondering why our pool was always so warm without a heater 😅

  • Ew thats actually gross when you swim in a cummunity pool or even a hotel pool i always smell that in it knowing its PEE!!!

  • The first 3 seconds of this video honestly scared me until I realized it was just Mark

  • Just gross i say


  • Meet the Sniper:

  • I am glad I watched this.

  • Omg i wish he was my dad ;(

  • I recently heard that sweat composition is very similar to urine composition. It made me think of this video. And helped me sleep at night. I can live with sweat being in the pool.

  • 🙄🙄🙄

  • what if you came to a pool and there was 13 gallons of pee in the entrance and a sign saying this is how much pee is in here Enjoy!

  • See in thecpool

  • See in the pool

  • I'm from Canada too

  • The ajar swing ethnopharmacologically harass because ceramic biosynthetically empty including a madly mistake. lonely, guttural H habitual basketball

  • Fascinating Fascinating

  • This is where I live🇨🇦

  • Why go to school class when you could watch this???😂

  • Who actually pees in the pool? I once peed in the beach and there was no one around me and it felt weird af

  • Sweet

  • Wouldn't the concentration of the sweetener vary based on WHEN the sweetener was consumed, and by WHOM? It could certainly happen that most people didn't consume artificial sweeteners but still peed in the pool. I can't believe they're using concentration of ONE compound as a marker of the amount of pee.

  • LOL did he really jump into the pool in his cloths!

  • me to h😝

  • thanks for telling us

  • thats fucked up bro ewwww

  • her: then were gonna transfer it into this instrument me: been living under a rock

  • i see the pee mold down there

  • Why are dislikes disabled?

  • who tf pees in swimming pools

  • So your telling me there is pee in the source water.

  • That's it!! Never going to Public Pools ever..

  • Michael Phelps does it so ... its ok 👍

  • Where do u get gallons of pee

  • i never pee on pool

  • Luckily i have a small pool in my house

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  • Welcome to our ‘OOL’ notice there is no P in it. PLEASE KEEP IT THAT WAY!

  • me to

  • So we not gonna talk about how he came out the water

  • And water goes in my mouth when I go in a pool 👁👄👁

  • God I used to miss swimming in lockdown

  • Omg no swimming for me ever eww!!!

  • i don't want to swim in a pool anymore...

  • I will never swim in a pool again

  • 4:04 windows xp

  • Why?

  • Cuz of dis i remember someone standing on the small flat rock and peed in the pool

  • I haven’t been in a pool in 2 yrs

  • Is Canada a good country in your opinion

  • I knew a shortcut Undertale fans : S A N S

  • Thank God I don't know how to swim

  • I don't have a pool

  • K now i ask u this How much pee is in a ocean

  • how munch pee in the sea

  • LoL :)

  • i eat pink eggs

  • Ewwww pee

  • Nobody: Sans: 0:56

  • ,รอจราจรเ

  • I wonder if variables like people possibly being more willing to pee in a public pool rather than their own community pool at home could cause differences in readings.

  • I have a pool and we have a sign that says “We don’t swim in your toilet, don’t pee in our pool”.

  • I have 6 gallons of PEE in MY pool 🥲🤮😭

  • I’m not gonna pee in a pool EVER again

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  • Have u ever peed in a pool

    • I pee in the sea wen i was a kid

  • Me smelling the pool smell: Thinking it’s normal Me: **REMEMBERS THE VIDEO** 🤮🤮

  • What even is shahatahtashatah chemical thingy

  • 🤮🤣

  • Watch video remembers smelling like clorine after being in a pool O.O

  • the intro tho

  • I want to jump in a pool again

  • i don't pee at the pool i barf!!!!

  • After peeing in the pool as a kid since like 6 yrs old, did some thinking..... i never swim in a pool again afterward....

  • I really liked the video, it's the first time I've seen your videos but I liked them a lot

  • In 2021 what the he double hockey stick is he doing with pee people 3 years ago it’s understandable

  • Davidgotkicks Davidgotkicks Hace 3 años Watching this makes me never wanna swim in a pool again 😂

    • @Maria FortreshMG seras tu porque yo si se

    • Nmms en serio copiaste esto por que no sabes decirlo en ingles?

  • noooooooooooooooooo

  • He-hey mark where did ya get those gallons of pee from..

  • Look at the date of the comment bellow me

  • so if a pool smells like a pool it has pee in it😦

  • Me:so now i wont swin in the pool acros the street . My sister :what ever .