SCIENCE CLASS #1- WHY Does Helium Make Your Voice Higher?

Live stream with demos your brain will enjoy where we answer a basic question every time.
Does farting make you weigh more or less?!?! Place your guess and give me feedback too-


  1. Mark Rober

    Mark Rober8 kun oldin


  2. Unicorn Butt face

    Unicorn Butt face7 kun oldin


  3. Érika Matteau

    Érika Matteau7 kun oldin


  4. Érika Matteau

    Érika Matteau7 kun oldin


  5. Érika Matteau

    Érika Matteau7 kun oldin


  6. Érika Matteau

    Érika Matteau7 kun oldin


  7. Daniel Middleton

    Daniel Middleton57 daqiqa oldin

    That’s a Skelator shiirrrrrttt!!!!

  8. Kerry fyi

    Kerry fyi2 soat oldin

    Thanks Mark Rober, you're keeping me sane

  9. Matty k

    Matty k3 soat oldin

    farting does help you loose weight

  10. Dali Brabec

    Dali Brabec3 soat oldin

    the corona viris is stinky

  11. Rhiannyn Reynolds

    Rhiannyn Reynolds5 soat oldin

    i was NOT prepared for that giant air horn ....

  12. Jacinth

    Jacinth5 soat oldin

    You missed the opportunity to say 'ma in the chat' instead of 'F in the chat' because F=ma

  13. mrn. gr.

    mrn. gr.6 soat oldin

    <a href="#" class="seekto" data-time="80">1:20</a> 👌

  14. Rodney Bentley

    Rodney Bentley6 soat oldin

    I move that the Imperial Measuring System heretofore be renamed "Freedom Units"

  15. Shattering Diamond

    Shattering Diamond7 soat oldin

    He was so nervous and kept bringing up this is live.

  16. Crue Bundy Outdoors

    Crue Bundy Outdoors7 soat oldin

    come on mark give me a shout out pls

  17. Samuel Thompson

    Samuel Thompson9 soat oldin

    Insta-subbed. The presentation here is extraordinary.

  18. Jim hobbs

    Jim hobbs9 soat oldin

    This is a kind of back handed compliment, you come across so much better live, I used to find you a bit to cocky, but live you're humble self shines through.


    DYLAN PERRY10 soat oldin

    Who else thought that the first 5 seconds were in slow motion

  20. Samuel Simons

    Samuel Simons10 soat oldin

    I don't think God created the universe like that

  21. Raagul Suresh Babu

    Raagul Suresh Babu10 soat oldin

    Hey Mark can you make a video on the world's lightest solid

  22. Cristi Macovei

    Cristi Macovei10 soat oldin

    that's literally the best explanation i've ever heard keep up the good work my guy

  23. andrew calhoun

    andrew calhoun12 soat oldin

    I Show my teacher dis

  24. TysenTJF !

    TysenTJF !13 soat oldin

    I have always wanted a science teacher like you I am a middle schooler

  25. DJ 44455

    DJ 4445514 soat oldin

    The next Eddie Woo

  26. DannyJ Fedora

    DannyJ Fedora14 soat oldin

    My science teacher put this on our online class. This is the first thing on this. This is the best science class ever.

  27. xX Galaxy Studios Xx

    xX Galaxy Studios Xx14 soat oldin

    I already watch Mr.Beast he is amazing

  28. Breanna Y

    Breanna Y19 soat oldin

    Why does your stomach growl and how can you hear the water in ur stomach when you exercise

  29. Jon Lon

    Jon Lon19 soat oldin

    When a pilot breaks the sound barrier does he/she hear the sonic boom? Also, while traveling faster than the speed of sound does a pilot hear sound from the jet engine?

  30. Breanna Y

    Breanna Y19 soat oldin

    I have a question how does whistling work?

  31. Dirks The Immortal

    Dirks The Immortal19 soat oldin

    It Would be so cool to have mark rober as ur science teacher

  32. Mick dot com

    Mick dot com20 soat oldin


  33. Kaeden Dansereau

    Kaeden Dansereau20 soat oldin

    Mark why didn't the helium balloons float?

  34. Brennen Wright

    Brennen Wright22 soat oldin

    So, in a way does that mean that people with lower pitched voices just have "weaker" or "slower" vocal cords because they're moving air slower than the vocal cords of someone with a higher pitch voice? Or is this concept different when referring to just the regular voice of a person.

  35. Christopher Acosta Simon

    Christopher Acosta SimonKun oldin

    I would love to have Mark as my physics teacher.

  36. Christopher Acosta Simon

    Christopher Acosta SimonKun oldin

    Chalk drop *he drops the chalk which makes the first one collide with the second one and the second one drops to the ground* Chained reactioned chalk drop Science y'all

  37. Jon Deneen

    Jon DeneenKun oldin

    I think Mark needs to be teamed up with Elon Musk

  38. Jon Deneen

    Jon DeneenKun oldin

    I quote "From the drug world it's like uppers and downers" -T. McKenna

  39. taylor patton

    taylor pattonKun oldin

    Oh that’s why your voice is lower in slow motion and higher when it’s sped up

  40. The Turtle Person

    The Turtle PersonKun oldin

    Mark Rober: "Teaching High School physics is like my dream job" Also Mark: "I hate public speaking" Should we tell him?

  41. Joel

    JoelKun oldin

    I had the AH HA moment and I LOVED IT That’s so coooollllll

  42. Vghs. Go gxf. Games

    Vghs. Go gxf. GamesKun oldin

    The Big Bang can’t actually happen

  43. Kris Kirby

    Kris KirbyKun oldin

    Thank you your videos are awesome and I enjoy watching your videos and look forward to them ( also when we started the space unit I got excited and taught the class about the part of the rover you built/helped build) keep going stay safe

  44. reesa beee

    reesa beeeKun oldin

    cool bro... my daughter will be stocked up on science projects ..

  45. wy

    wyKun oldin

    you look so scared 🤣 I feel bad

  46. Desert Fresh

    Desert FreshKun oldin

    Mark's such a great teacher. He even left the mouse on the screen while showing a video!

  47. v KEITH v

    v KEITH vKun oldin

    1<a href="#" class="seekto" data-time="301">05:1</a> like to dislike ratio... *everybody liked that*

  48. Damonion Katsby

    Damonion KatsbyKun oldin

    Thank you so much for doing this you are awesome

  49. Max Ellis

    Max EllisKun oldin

    Me and my family have been offering to buy our elderly next door neighbours their shopping.

  50. Sarah Chen

    Sarah ChenKun oldin

    If he was going to be a teacher I would really want to be in his class

  51. christian hirwa

    christian hirwaKun oldin

    this is better than my brain


    WOOGTSARKun oldin

    For all of you who wanted him as his science teacher, there you go.

  53. ME PS3D

    ME PS3DKun oldin

    So he is going to be someone’s teacher I’m jealous

  54. f trouvé

    f trouvéKun oldin

    best teacher, thank you so much

  55. Tasia Hampton

    Tasia HamptonKun oldin

    You are genuinely the best person on UZgo. No other channel compares to this one

  56. Tasia Hampton

    Tasia HamptonKun oldin

    Ok maybe except mr.beast

  57. Diaz055

    Diaz055Kun oldin

    Learned more from this video than my hs class.

  58. H Carol

    H CarolKun oldin

    Thank you so much for doing these videos!!!

  59. Andy Hi

    Andy HiKun oldin

    Anyone notice the red balloon slowly shrinks

  60. Davii5

    Davii5Kun oldin

    so this means that someone with low voice talks slower than someone with a high pitch voice because of physics??

  61. K-Tar

    K-TarKun oldin

    Mark would be a perfect teacher because he forgets the mouse on the screen.

  62. Wiggle Wiggle Are Made of This

    Wiggle Wiggle Are Made of ThisKun oldin

    Oh, hi Mark! I like your humble approach to photosynthesis and biologic sciences in general, it says you know what's going on. To me the saying "knowing things takes the magic of it" seems like a missconception about a missconception. Compared to other fields (and always, with caution trying to make fair comparisons) advanced biology it's a very chaotic, emergent, integrative and with many no-answers field. Just the example about how an organism derivated from LUCA started using the energy from the sun in the most efficient way, invaded Pangea and became the most prolific organism on the entire planet, with complex mechanism and variability to reproduce itself wich involves a co-dependent evolution with other movil species such as animal kingdom, to end being the freaking plant ripping the water molecule and bringing oxygen we know from school. The more you know about specifics of photosyntesis, the more impressive it becomes (and the same goes to microbiology in general). I also appreciate your exposition about going live, you are going well. Congratulations about this initiative and keep it up.

  63. Nafhoon The Ninja

    Nafhoon The NinjaKun oldin

    Why is he looking under the camera Is he looking at words?

  64. Nafhoon The Ninja

    Nafhoon The NinjaKun oldin

    You make my life amazing

  65. Alejandro Jimenez

    Alejandro JimenezKun oldin

    Wow i loved it 🤯

  66. Dr. Adam

    Dr. AdamKun oldin

    Mark- Ark and cause a spark... Me: ENGLISH CLASS PLUS SCIENCE!!!

  67. Dr. Adam

    Dr. AdamKun oldin

    Mark: 15 mins long Me- plus 20

  68. Hi Welcome

    Hi WelcomeKun oldin

    When you inhale helium , you sound very weird on <a href="#" class="seekto" data-time="76">1:16</a>



    why are you not a teacher

  70. It'sCyan

    It'sCyanKun oldin

    You can tell Mark’s gonna make a fine teacher by the way he keeps the cursor on the screen while the video plays

  71. jeffero10

    jeffero10Kun oldin

    Yo, mark rober can u like move to maryland and work at south river high so you can teach me 11th grade ap physics. :)

  72. Raman Sharma

    Raman SharmaKun oldin

    I'm your fan after today... not because of what you're doing (that's already established that you're amazing at what you do ) but because of seeing you getting emotional while speaking about punching Corona... it says a lot about your personality and how much you really love contributing for betterment of humanity. Namaste.

  73. This is Sammie Sue's World

    This is Sammie Sue's WorldKun oldin

    I'm 41, and love thank you!!!

  74. That Giant Fabric Parrot Perched on the window

    That Giant Fabric Parrot Perched on the windowKun oldin

    I love how he’s doing that nervous sway thing that people do when they’re public speaking and it slowly disappears.

  75. The.Moss.Then.Is Cut

    The.Moss.Then.Is CutKun oldin

    This is like a TEDx during social distancing. Doing your presentation speech solo. Cool!

  76. drewjosh

    drewjoshKun oldin

    Mark Rober does workout in his physics class :P

  77. Fabio C.

    Fabio C.Kun oldin

    <a href="#" class="seekto" data-time="1401">23:21</a> the heaviest balloon touched the ground first! This really surprised me. It took a few minutes to figure it out.

  78. Joseph Hayden

    Joseph HaydenKun oldin

    When he said That "oil sinks and water sinks up" you notice he doesn't notice that he made a linguistic mistake.

  79. Nadav Rofe

    Nadav RofeKun oldin


  80. Drake Mallard

    Drake MallardKun oldin

    Mark, you are amazing and I love your enthusiasm and edited videos. Practice these lectures at least 3 times as many times as you have in front of a mirror, or take some improv classes. I am not trying to be discouraging, but its not about how many people are watching. It's about your confidence in the lecture you are presenting. The better you know exactly what you want to present and how, the better it will be received and absorbed.

  81. MR.Silver

    MR.SilverKun oldin

    I'm a 13 year old and i watch your videos

  82. Stitches X

    Stitches X2 kun oldin

    Replacement for school... I like it

  83. Grid Master

    Grid Master2 kun oldin

    I love this, I love how nervous he is. Makes him so much more human lol

  84. Mel J Easthope

    Mel J Easthope2 kun oldin

    This is perfect to watch even if you’re not a parent or a student!! 💙Mark!!

  85. Stop motion central

    Stop motion central2 kun oldin

    School teachers: aren’t being responsible and not giving us any work to do over the break Mark: I am now your teacher

  86. Hey that's Awesome

    Hey that's Awesome2 kun oldin

    Plz don't become a teacher make UZgo videos