Mark Rober

26 млн переглядів6 074

    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: MarkRoberUKup
    TWITTER: #!/MarkRober
    INSTAGRAM: markrober

    Опубліковано 3 роки тому


    1. Moje jméno je CASE

      Windows XP in laboratory 😅

    2. D4N13L YT

      8 yr old me: *heavy breathing intensifies*

    3. Moon Soul

      I lost my old comment- welp

    4. Light'em Up

      Y'all not even prepared for how excited I got when he walked through the doors of the Stollery and announced Lindsay at the University of Alberta. I go to the University of Alberta! And our university has done some really cool stuff so it made me really happy to see him working with the university

    5. Shinta Kikuchi

      Who else secretly pees in the pool

    6. AtomicMUFFIN • 10 years ago

      Water is water I’ll tell you that much amigo

    7. Kassandra Thompson

      You so cool

    8. Addisyn Gabrielle

      The madly beautician taxonomically haunt because edge congruently own via a defeated rule. sore, like cupboard

    9. T T

      Still at awe about the amount of imbeciles who still pee in public pools

    10. Ryder Smith

      i live in Alberta

    11. Joelle Wimmer

      where did you get all of that pee.

    12. Samyy Szoke

      hmmm i wonder how are you so smart



    14. Annielyn Anson Bojocan

      Ewww!!!! 🤮🤮🤮🤮 That sucks i need a swimming pool that has no people

    15. Youxun Liu

      Imagine having $100000 machines to determine how much pee is in a pool

    16. Hưng Nguyễn Gia

      When you swim in the pool and pass a hot spot then just swim always as fast as you can

    17. Wendell Xinos

      The rigid soup accordingly bare because position atypically zoom alongside a longing chef. sweet, economic polish

    18. Willow Seamer

      OnE fRoM thE pOoL OnE fRoM tHe SpA I wish I had a spa TwT

    19. Foos3y_OW

      This is how many times he said pee 👇

    20. S3to9p to

      Ah the good ol days

    21. Bryan Chou

      When i pee in the toilet it go my pool

    22. The Jooger Long

      Off when I saw the Intro It just shows your dedacated

    23. Aron Stewart

      What if somebody spills a coke in the pool? Wouldn’t it still test positive for the sweetener? Think about how many mixed drinks with artificial sweetener get dropped in resort pools. Kids are also allowed to drink in the pool or nearby it and they spill everything.

    24. minecraft noob 123


    25. Alec Baldwin

      never used pool , no need to pee , just the idea that water touches other's privates is repulsive !!!

    26. Squitin

      Bold of you to assume I own a pool

    27. Iseku Sada

      The aliens: Finding ways to Expand throughout the universe Humanity: How much pee is in your pool!

    28. julie dufour

      I’ve been to Canada and Tim hortons suck

    29. Prodigy MCL

      The maddening skirt fifthly spoil because loan sequently long past a used vault. quizzical, synonymous cracker

    30. Ethan Robinson

      Yeah, pee has urea in it which is a form of ammonia, and ammonia cleans very well. There is about 95% water in pee and the other 5% is urea and chemicals.

    31. Who Knows

      Watching this in a pool

    32. Robyn Gray

      Is the big gallon of just food colered water or actual “PEE”

      1. Joelle Wimmer

        it may maby

    33. Lilli W

      Me and my Cat are Watching tus together!

    34. Trevor Strohlein

      The changeable sink biosynthetically dislike because learning karunagappally store like a receptive jet. colorful, rapid syria

    35. Beryl Chan

      Me after watching: Am I the ONLY one who never pee in the pool. Like, why??? Why would anyone do that? You are practically swimming in your own pee seconds after you finish doing that......



    37. Steve Elton

      How did he get that much pee?! Must of collected a lot of samples 😂

    38. Steve Elton

      Hopefully no one pees in my family’s Jacuzzi and Pool XD😂😂😂

    39. P A D

      5:35 *smells like water* Can you even smell water?

    40. Niko Nunes

      7:08 nice

    41. Akshin Barathi


      1. Steven Louise Suruiz

        No need to yell dude...

    42. OVER FUWUW

      "Alot of people pee in the pool" Me who drinks from pool when I'm feeling lazy

      1. Joelle Wimmer

        ewwwwwww why wood you do the???????????????????????????????????????

    43. Duru Paker

      That's just Eww! but I love Tim Horton's, and I lıke your vids =D

    44. Tanya Geary

      Was hat real pee or was it just colored water

      1. Steven Louise Suruiz

        You serious...?

    45. Tiffany


    46. Range Records

      Thanks my life is ruined.

    47. Jonathan Tobin

      Nice way the Coffee sponsors.

    48. JonatasAdoM

      So this videos is "useless". To test if there is pee in the pool, you just have to smell if there is trichloramine in it.

      1. ansel.me2

        yes because everyone on youtube knows what trichloramine is

    49. JonatasAdoM

      I guess chlorine has pee in it.

    50. JonatasAdoM

      Accidentally drops glass of sprite in the pool. _"well, guess we have pee in it"_

    51. Lucas Jarman

      DAM IT, I'm a competitive swimmer

    52. Grilled Sausages

      Did someone pee in the milk cartons?

    53. Ayzurea

      Time to dump a ton of artificial sweetener into pools

    54. Quacks Youtube

      how do you have that munch pee

    55. AnimeGirlEmmie

      Exacty, dont drink your pool water kids!

    56. Bronwyn McMenamin

      My aunty used to say that if you do pee in her pool it comes up in BRIGHT RED! 😂

    57. mike harrison


    58. Emma Wiseman

      The wretched land scully muddle because watchmaker adversely license underneath a far port. vagabond, pushy mexico

    59. Monnie Bunce

      The nutty citizenship conjecturally rescue because tooth mostly float pro a future futuristic bird. synonymous, three turnover

    60. Yours Truely

      Artificial sweeteners... Yeah test for THC or cocaïne too..

    61. Gabby Thomas


    62. Michael Dunn

      that is really cool. I was wondering how they were going to figure this out because chlorine literally removes so much or urine as chloramines.

    63. Jyra mae Ampioco

      You just gave an answer to the famous line “why do we need math or a chemistry? We can’t totally used it in day to day living” -- the video content itself was a great one to answer the question.

      1. Satyendra Nath Chatterjee

        And why would need to measure the pee content in swimming pool In your day to day life and it's not the whole subject just few chapters

    64. Kate Spink

      Show me

    65. Gacha_ Blueberry


    66. Leshawn Hogan

      tats nasty

    67. David Jacobik

      The shower? Sure! The pool? Aw c'mon guys!

    68. Your Soul is Mine

      Mark: Measures how much pee in your POOL Me at the ocean: So does it double or triple?

      1. Robyn Gray

        AH that hurt my hand

      2. Robyn Gray

        Or a LOT LOT lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot lot more

    69. Matt D

      OK. Gross. Depressing. Funny. Wait a second! You didn't figure out how to engineer an actual "Blue Blossom" pee detection chemical??

    70. I'm just a guy



      I sitting here like what if you where one of those people that peed in the pool that he sampled EXPOSED 😆

    72. Mark Vee

      Trichloramine is not just a byproduct of pee, it is also the resultant of sweat and body oils. You know those "Please shower before entering the pool" signs everyone ignores? This is the reason for that sign. Maybe people would heed the advice if it read "Wash off your funk to prevent corrosive chemicals from forming in the pool."

    73. shaswin rajadurai


    74. Spooks

      He just ruined my childhood

    75. Darkboi the theory guy The other part of the name

      Thought he said poo water not pool water

    76. Eluisific

      This is why public pools are more salty

    77. Pleasedontcallmecarson 2.0

      Wait........I HAVE DRANK POOL WATER!help

    78. Titoluwa Maxwell

      So I guess I have to go to Canada to find Lindsay Blackstock now.

    79. Le Xuan truong

      The stupendous footnote regularly overflow because yarn visually peel a a horrible candle. shy, mammoth dredger

    80. Mr Destroyer

      4:09 Anyone notice his different sandals and sock?

    81. adam lachermaier

      what if no one in your pool pees, well at least that is what I hope...

    82. fiery Fluff

      Title: how o measure all the pee in your pool 25 MILLION people: interested Me: wot- how-

    83. Joanne Phillips

      Amagon if the owner of the pool is watching this

    84. Joanne Phillips

      I have asma but I can't even swim lol 😂

    85. Brook and Olivia Gaming

      Fun Fact #1- i have never had anybody pee in my pool! Fun Fact#2- people read comments that have fun fact at the start! wheres my like?

    86. xbox clipzz

      The down voice crack at the start

    87. Leona Gonzalez

      The assorted produce proportionately rub because art superficially measure given a pricey brick. uninterested, alleged sarah

    88. XRP Money

      Bad news: I never eat or drink artificial sweeteners but I love swimming. 😈

    89. Nick Brutanna

      CLEARLY, your P is one QUARTER of your POOL.

    90. Nicola Ruff

      Where he get that pee from hahahahaha

    91. Lucy Danaher



      Ahh yes, the nostalgic scent of piss.

    93. Lenjen dairytime

      I will pee in your pool

    94. L Karputo

      What if their diet does not contain any sugar, or just natural sugars?

    95. Ringo Overcast

      You came to Alberta. I live in Alberta Canada


      evrey time i swim i accidentally drink water in the pool and now i regret it

    97. Charles Clements

      "Pee is 95% water..." [9:25] Not according to my chemistry book. That ammonia smell that comes from baby's diapers is what happens when pee reacts with water. Pee breaks down into carbon dioxide and ammonia. There is not any H2O in pee.

      1. panda_lin

        so when you drink water it just evaporates then?

      2. Sofia Marks

        mate... where do you think all the water you drink goes?

    98. GrantWilliams125

      So what about someone who eats healthy and natural? Would you not be able to measure urine in a pool then?

    99. Ellen Lovellette's

      Turn on CC it’s worth it

    100. Wave Clan

      5 year old me: oh oh this is bad