Mark Rober
Mark Rober
Mark Rober

Former NASA engineer. Current HRgor and friend of science.
Answers to some common questions:
1) I studied Mechanical Engineering in School. I did my undergrad at BYU and Masters at USC.
2) I worked for NASA JPL for 9 years, 7 of which were working on the Curiosity Rover (I made a video about it you should def totes watch cause it's probably my favorite of all my videos). I founded a company called Digital Dudz on my nights and weekends while working at NASA (also made some videos about that) and sold it to the guys who make Morphsuits in the UK. As part of the sale I quit my job at NASA and worked for them coming up with all their new costume ideas for 2 years. Recently, I was presented with an opportunity to return to my Engineering roots to come do some ideation type of work for a tech company near San Francisco.
3) Link to free and therefore substandard build plans for my custom workbench can be found below.

Is NASA a waste of money?
NICEST Car Horn Ever- DIY
LED Edge Lit Table- HOW TO
Shower Hair Art- a mural
5 EPIC pranks in 60 seconds
Make a Gorilla cam- HOW TO
  1. Babayega X

    Babayega XPrije 16 sati

    Video message: "No need to panic, everything is under control, just have to flatten the curve. But DON'T PANIC" Corona death toll: "hahahahaha, yeah no need to panic just because I've killed 27k people and infected 580k people so far worldwide. And that's just until today 3/27/20. Just wait till you see the rest" Yeah ok. We won't panic.

  2. astrice nox

    astrice noxPrije 16 sati

    Ans: If you're in a bath tub filled with water, you can try to put a bucket over your hand. Then submerge your hand together with the bucket. Your hand will not get wet because there are already air molecules inside the bucket so the water molecules can't occupy the space inside the bucket (w/c your hand is in). *They did this on Pirates of the Caribbean. My brother also tried it and it works.

  3. William Hancock

    William HancockPrije 16 sati

    2:31 The Waterboy reference right there

  4. Tanay Gupta

    Tanay GuptaPrije 16 sati

    13:56 "We've got Ken." Me: Wait I thought that was Jack

  5. henry paz

    henry pazPrije 16 sati

    Silly boy!

  6. Adithya Kumar Keerti

    Adithya Kumar KeertiPrije 16 sati

    Ans to the question: Cover your hand in Lycopodium powder!

  7. King jellyjam

    King jellyjamPrije 16 sati

    I’m sorry but meat taste too good to give up

  8. Ave'on Stanley

    Ave'on StanleyPrije 16 sati

    2:53 should be called barfing unicorn

  9. Damian Amoruso

    Damian AmorusoPrije 16 sati

    Answer: Put ultra ever dry one you hands

  10. Itz_ Sour

    Itz_ SourPrije 16 sati

    Lol they were arguing the last toilet paper 😂

  11. Mykasan

    MykasanPrije 16 sati

    how is this the third one ? i've never heard of this before...

  12. Mike Ockburns

    Mike OckburnsPrije 16 sati

    You know, I watched this video before the two reactions were cut.

  13. christopher matherne

    christopher mathernePrije 16 sati

    Rip dinos

  14. AliMok

    AliMokPrije 16 sati

    This is crazyyy I hope Manu stays happy and lives a long life ! Bless himm

  15. Vikri M G

    Vikri M GPrije 16 sati

    2:04 perfect! you guys in northern us should make this. so quarantine not going to be bored.

  16. Ethey Boy

    Ethey BoyPrije 16 sati

    It stunk so much I can smell it 🤢

  17. nour

    nourPrije 16 sati

    science makes so much sense with him, I said "wait so that's why the sky is orange during sunset" before he even got to that part.

  18. Omprakash

    OmprakashPrije 16 sati

    Elementary go watch electroboom

  19. christopher matherne

    christopher mathernePrije 16 sati

    F chose green because it is my favorite color

  20. Papa RyRy

    Papa RyRyPrije 16 sati

    Can you show the Behind the scenes

  21. scentsymom1

    scentsymom1Prije 16 sati

    Omg ewwww

  22. PJ Flood

    PJ FloodPrije 16 sati

    Then this record got shattered

  23. Jake Ryan

    Jake RyanPrije 16 sati

    This was great. I kid you not


    ZAPSPEAKABLEPrije 16 sati

    Put your hand in a diaper LOL ( ◠‿◠ )

  25. Dexter Morgan

    Dexter MorganPrije 16 sati

    next video "Proof the earth is a spinning globe rocketing through space faster than a speeding bullet"

  26. heather holt

    heather holtPrije 16 sati

    Just saying I would have lost on purpose!

  27. Josh Talavera

    Josh TalaveraPrije 16 sati

    This actually felt so awesome felt like I was in a real class with the echo and all but the thing is I was enjoying this “class” even though I don’t enjoy school

  28. Bernie is the Boss

    Bernie is the BossPrije 16 sati

    Because ozone

  29. le smart boi

    le smart boiPrije 16 sati


  30. Shrödinger’s Thetrapod

    Shrödinger’s ThetrapodPrije 16 sati

    Question Answer: Hydrophobic Coats

  31. AliMok

    AliMokPrije 16 sati

    Looking in 2020 this is INSANE marks content is always amazing

  32. Julio

    JulioPrije 16 sati

    Coat your hand with powdered aerogel

  33. A Bacteriophage

    A BacteriophagePrije 16 sati

    Thank you mark rober, my son doesn’t have school right now, and this really helped him. You were his science class for 3 days. He is in (kindergarten)

  34. Ben.

    Ben.Prije 16 sati

    People that disliked this video of mark teaching us for completely free probably just had their screen turned upside down

  35. Jayce Hettermann

    Jayce HettermannPrije 16 sati

    y do pepol diy

  36. Dustin Cerny

    Dustin CernyPrije 16 sati

    Cover it in wax Cover it in oil Or some other hydrophobic fluid You could also use really hot water but put you hand in cold water first to achieve the leidenfrost effect.

  37. Techntor

    TechntorPrije 16 sati


  38. Jonathan Tlumach

    Jonathan TlumachPrije 16 sati

    Why is a neutron star so dense

  39. Jayce Hettermann

    Jayce HettermannPrije 16 sati

    you are the best pleas shuot out im 9

  40. trini kids

    trini kidsPrije 16 sati


  41. Jake Smith

    Jake SmithPrije 16 sati

    Jump in the pool

  42. EmpireWorldwideTrade

    EmpireWorldwideTradePrije 16 sati

    DW already taught me why the sky is blue, ask Arthur. thanks

  43. Xxx•Zesty_lemon•xx X

    Xxx•Zesty_lemon•xx XPrije 16 sati


  44. Tom H

    Tom HPrije 16 sati

    Is the reason that blue light (higher frequency) is scattered before red light (lower frequency) sort of like how with sound bass (low frequency) travels further than treble (high frequency)?

  45. Rodrigo DDJr

    Rodrigo DDJrPrije 16 sati

    I've accidentally, and without knowingly, observed a way of preventing your hands from getting wet after fixing my hair with hair wax. Basically, when I'm done fixing my hair, I wash my hands afterwards because the feel of wax in you hands is very icky. However, the washing-of-hands-after-fixing-hair has become troublesome because IT WON'T WASH EASILY. It's like an instant waterproofing of your hands. Water just falls right off when I place my hand under running water. Then, after many great deal of handwashing, I tried putting dishwashing soap on my hands to wash off the wax and IT WORKED! So, if you want your hands to stay dry.. LATHER IT WITH HAIR WAX. And if you want it to come off, WASH IT WITH DISHWASHING SOAP... it will save you a great deal of time and water. 😉😉😁 P.S. Thank you Mark Rober for this AMAZING series and for making us all smarter than our yesterday-sleves!

  46. Komrade Sniper

    Komrade SniperPrije 16 sati

    When this class is already better than most remote learning classes

  47. Summer Everyday

    Summer EverydayPrije 16 sati

    Plant need red color light.

  48. Christian Leosaputra

    Christian LeosaputraPrije 16 sati

    But why there is no green sky? All of sudden the light from blue become red. Not changing slowly through all the light spectrums

  49. Jason Guerra

    Jason GuerraPrije 16 sati

    In order to keep your hand dry when you dip it in water you will need to put on a certain layer of like lotion on your hand

  50. Stan Gira

    Stan GiraPrije 16 sati

    I actually wondering how they got the blood....

  51. Thunder With The Three Strikes

    Thunder With The Three StrikesPrije 16 sati

    What if there’s a signal jammer or similar

  52. Johnathan Thompson

    Johnathan ThompsonPrije 16 sati

    Yessssss! We get this

  53. Alex Lamagna

    Alex LamagnaPrije 16 sati

    Other than aerogel, can't you use a hydrophobic spray on your skin in order to make yourself waterproof?

  54. Professor Nuke Inbound

    Professor Nuke InboundPrije 16 sati

    What about NASA class?? Or is that illegal? Explaining in detail how physics plays apart in math calculations with factoring-in the earths gravity and stuff like that. (A rover landing if it would happen on the earth, instead of on the moon)

  55. Az Man

    Az ManPrije 16 sati

    Mark, what happened to the cool inventions and stuff like that?

  56. Kenneth Jayadi

    Kenneth JayadiPrije 16 sati

    9:50 *pew* laser sound

  57. Connor Gibson

    Connor GibsonPrije 16 sati

    Mark we want More

  58. Johnathan Thompson

    Johnathan ThompsonPrije 17 sati

    Punchline Me:OMG!!!!

  59. T M P

    T M PPrije 17 sati

    I thought if you use baking soda floating on top of the water and it keeps your hand dry.

  60. Callan Ryu Brown

    Callan Ryu BrownPrije 17 sati

    Guys I’m only a kid and I don’t wanna brag or I don’t know if I am bragging but I kinda know what he is talking about

  61. Stephen S

    Stephen SPrije 17 sati

    To try to answer your question. Apply a hydrophobic substance to your hand, like oil or fat. Since the hydrophobic substance repells water, your hand will stay dry, even when submerged in water.

  62. Tanay Gupta

    Tanay GuptaPrije 17 sati

    These are very helpful to me as my science teacher isn't that great. They are super interesting and I hope you can continue doing these until the coronavirus is over!

  63. burgle cutt

    burgle cuttPrije 17 sati

    Great theory. But that means when all the blue light has been scattered in the sunset you could set something that is blue in the sunset light and it would no longer look blue... Sorry but this is a failed idea on why the sky is blue. This theory is science fiction

  64. Dominic Duenas

    Dominic DuenasPrije 17 sati

    apply car wax on your hand

  65. Respiration Oxidation

    Respiration OxidationPrije 17 sati

    this aged well

  66. Fallen Zinnia

    Fallen ZinniaPrije 17 sati

    18:29 wiped nose. fbi open up

  67. Andrew Richard

    Andrew RichardPrije 17 sati

    Mark, you are so great for doing this! "Always look for the people that are helping"... You're spot on with this, Love the critical thinking skills you're developing.

  68. Smalls_YT

    Smalls_YTPrije 17 sati

    Because hydrogel polymer composite isn’t strong enough to hold you from getting wet you should use the Aerogel polymer to cover your hand and it will refuse to make your hand wet

  69. Lino Bartolo

    Lino BartoloPrije 17 sati


  70. PDMC41506

    PDMC41506Prije 17 sati

    He looks like a rip off Tommy Oliver

  71. Rozelle Ferrer

    Rozelle FerrerPrije 17 sati

    You would be an amazing teacher!

  72. Spacedust4444

    Spacedust4444Prije 17 sati

    (Question for next time) Since water is polar, can't you dip your hand in some thing non-polar to block the water from getting your hand wet?

  73. Elaina Is the best

    Elaina Is the bestPrije 17 sati

    LOL! 🤣

  74. Kristopher Rahn

    Kristopher RahnPrije 17 sati

    Bbq food is delisious

  75. Jessica Alger

    Jessica AlgerPrije 17 sati

    This is cool

  76. LesDexia13

    LesDexia13Prije 17 sati

    At 5:57 - "Purple" does not exist as a single wavelength - it is individual red and blue wavelengths that are combined by your brain. The visible single-frequency color next to ultra-violet is violet, not purple.

  77. QUiK WiDiT

    QUiK WiDiTPrije 17 sati

    This means so much Mark you have no idea. These few minutes of normalcy are truly priceless. Also, you are honestly getting better. It definitely shows

  78. Cash Morgan

    Cash MorganPrije 17 sati

    Maybe to have a “waterproof hand” is getting a waxy or oily solution and putting it on your hand as fatty acids are hydrophobic


    ZANEY BOIPrije 17 sati

    putting aerogel on your hand's can make them waterproof.

  80. Rubik's Cube

    Rubik's CubePrije 17 sati

    If he plays for the Mets, he's not professional.

  81. Ron loves France

    Ron loves FrancePrije 17 sati

    Make sure of the never hug ur friends cuz coronavirus and there is another virus called the hantavirus

  82. Vivian Li

    Vivian LiPrije 17 sati

    Answer(?): What if you coated your hand in oil (or anything non-polar)? Water repels oil because only like dissolves like, so your hand wouldn't touch the water.

  83. Tg Vg

    Tg VgPrije 17 sati

    Turtles are sea animals they can’t survive on land.

  84. Nicø and the Niners

    Nicø and the NinersPrije 17 sati

    though i am scared of sharks, them petting the sharks are too cute (im just gonna leave the timestamps for cuteness) 11:55 12:38

  85. learn maths

    learn mathsPrije 17 sati


  86. That Kilted Guy DIY Home Improvement

    That Kilted Guy DIY Home ImprovementPrije 17 sati

    Dude, why are you wearing a skirt? One of the most common questions on my channel, lol.

  87. Gathan M.F.

    Gathan M.F.Prije 17 sati

    Frick i missed again


    MUDSWATPrije 17 sati

    What can we use to sanitize cloth or even N95 masks? Do those UV light germ wands work?

  89. sadie lees shop

    sadie lees shopPrije 17 sati

    1.spray the hydrophobic stuff on top, and when you put your hand in the water, it will coat it, therefor keeping your hand dry. 2. put your hand in an upside-down bowl. Put your hand in the water, but with it bent up into the bowl. The air in the bowl will get trapped, and your hand will be in the air. 3.pretty much cover your hand in anything non-pours

  90. Shu

    ShuPrije 17 sati

    You can cover your hands with aerogel.

  91. Steve Spivey

    Steve SpiveyPrije 17 sati

    One major flaw in the methodology, I never eat/drink anything with artificial sweeteners. Yes, I do check ingredients before buying.

  92. Arts & crafts TV

    Arts & crafts TVPrije 17 sati

    Excellent 💯👏👌👍🌹

  93. DavidsTV

    DavidsTVPrije 17 sati

    Do your kids love science and physics like you? You are the absolute best!!!❤❤❤❤❤❤❤❤❤❤❤❤❤❤

  94. Andrew Taggart

    Andrew TaggartPrije 17 sati

    I think your hand doesn't get wet because our body's are made of water and absorb water via ozmosis and what's left rolls off

  95. Karlo Đukin

    Karlo ĐukinPrije 17 sati

    Hydrophobic substances make a surface "scared" of water so the water just slips off or floats on the surface.

  96. Unicorn

    UnicornPrije 17 sati

    mark rober: ok guys this is science class guys *instantly talks about Naruto*

  97. WebPros TV

    WebPros TVPrije 17 sati

    I’m relieved to watch this online Or I would have just passed out cause I got hit by flying clues, a blue marker, and a rolling globe But still. Awesome class mark!!

  98. RaviRaj Gupta

    RaviRaj GuptaPrije 17 sati

    Well the easy answer is put it in Mercury. I'll think more to expand on the same.

  99. Scorch Stream

    Scorch StreamPrije 17 sati

    The reason you can’t get wet from water, I think, is that our body is already full of so much water that it just repels it . Thanks for all of these videos Mark.

  100. Neetesh Raj

    Neetesh RajPrije 17 sati

    Threat for the Humans are Humans 4:07 Kim Jong-un lol 🤣