How to save 51 billion lives for 68 cents with simple Engineering

Шинжлэх ухаан & Технологи

Using the power of engineering and brilliant inventions to save lives!!! Great times collab-ing with Bill and Melinda Gates! You should check out the Gates Annual Letter here:
Pre-order a paper microscope here-
Read the published paper on the paper centrifuge, its cool-

0:15- The Ocean- Andrew Applepie-
2:18- Sweet Tomorrow- Andrew Applepie-
4:21- Berlin- Andrew Applepie-
7:54- Special song written just for me- Lincoln Hoppe,

Summary: I met with Manu Prakash from Stanford to talk about 2 of his labs' inventions the Foldscope and the Paperfuge. Combined these cost only 68 cents and they can be used to diagnose Malaria. Both of these are examples not only of simple, brilliant design, but of how engineering is used to make a positive dent in the world.

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


  • Moon Whale
    Moon Whale9 минутын өмнө

    Not all hero's wear capes.

  • Godzilla Craft Gaming
    Godzilla Craft GamingЦагийн өмнө

    My friend: *buys a $2000 microscope* Me: *buys one for 68 cents*

  • The Deus
    The Deus3 цагийн өмнө

    In reality everything is free to make

  • Cris- Yo19
    Cris- Yo195 цагийн өмнө

    This was extremely educational, I knew about centripetal and centrifugal force but never would have occurred to me of using it for these purposes. Impressive.

  • Jeffrey Bob
    Jeffrey Bob5 цагийн өмнө

    "Microbial roomba" -Mark Rober 2017

  • AntonioSerranoRodríguez
    AntonioSerranoRodríguez6 цагийн өмнө

    I only want 1 basic kit but in the shop i only can buy 20 basic kits or a ldeluxe kit??

  • JohnP 8264
    JohnP 82646 цагийн өмнө

    Imagine his voice in 20 12

  • Bob Hart
    Bob Hart7 цагийн өмнө

    We could have eliminated malaria if it weren't for the fear mongering Silent Spring by Rachel Carson.

  • Jamie Dockery
    Jamie Dockery7 цагийн өмнө

    Did anyone else think that the thumbnail looked like a nut? No?oh ok.....

  • DerAlexLP 2
    DerAlexLP 28 цагийн өмнө

    Cmon it would have been better for 0.69 Cents don’t you agree

  • Cat Draws
    Cat Draws10 цагийн өмнө

    Blood is red, yellow, and (i think) orange if you put them in and let them spin in an centrifuge. Got it out of a science book :P

  • Cat Draws
    Cat Draws10 цагийн өмнө

    Just one more cent please-

    OH YEAH MR KRABS10 цагийн өмнө

    Save 51 billion lives? World population: Am I a joke to you?

  • Shao yuan Choo
    Shao yuan Choo11 цагийн өмнө

    51 billion lives i thought it is 7 bililon

  • Camera
    Camera12 цагийн өмнө


  • Revo Vids
    Revo Vids12 цагийн өмнө

    manu sounds like the guy from sponge bob like "one hour later" lmao

  • The ForecastTM
    The ForecastTM14 цагийн өмнө

    I wanted to ask that is every minecrafter is science lover and Watcher? I want 51B like in this comment Wait wut? 51B?

  • Zuhayb Abdul
    Zuhayb Abdul14 цагийн өмнө

    The 5.9 thousand people who disliked probably cant afford it

  • MR crazy memes
    MR crazy memes17 цагийн өмнө

    Title: How to save 51B lives..... Me: wait I thought there were only 7 billion humans

  • Sayuj Bhirud
    Sayuj Bhirud18 цагийн өмнө

    mera bharat mahan.

  • Not Cursed
    Not Cursed18 цагийн өмнө

    who tf disliked this video..? like there are 6k dislikes come on bruh

  • Faze-Noo_ B
    Faze-Noo_ B19 цагийн өмнө

    There is only 7. something billion people in the world so you cant save 51 billion

  • The Malaysian Kids Channel
    The Malaysian Kids Channel20 цагийн өмнө

    Nas daily d9 this forts and then you come

  • the hobos
    the hobos21 цагийн өмнө

    i think that he saved a lot of enchiladas

    COLDRAMEN YT21 цагийн өмнө

    remove tiktok we save humanity

  • Jgg !
    Jgg !Өдрийн өмнө

    The only issue I can see is people not knowing what to look for but I think that This is an amazing invention

  • Ethan Barclay
    Ethan BarclayӨдрийн өмнө

    <a href="#" class="seekto" data-time="199">3:19</a> "I think I'm gonna get it"

  • Jimmey 91
    Jimmey 91Өдрийн өмнө

    To show my school

  • Jimmey 91
    Jimmey 91Өдрийн өмнө

    Where can I get one of each

  • Common
    CommonӨдрийн өмнө

    I feel so sad seeing such brilliant people going away from the subcontinent to work in the west.

  • Hansom Sgwidwart
    Hansom SgwidwartӨдрийн өмнө

    51 billion?! or 51 million?!

  • JustaRandomGuy


    6 цагийн өмнө


  • Cheater Tenfold
    Cheater TenfoldӨдрийн өмнө

    All those dislikes are people who like death, and rich people that hate poor people. True facts.

  • Oreminer 69
    Oreminer 69Өдрийн өмнө

    Bruh I thought that the thumbnail was a frozen deer.

  • Eating fruit roll ups for a Living
    Eating fruit roll ups for a LivingӨдрийн өмнө

    Where can I buy these please link me I would love to help the cause

  • beep
    beepӨдрийн өмнө


  • Jotaro Kujo
    Jotaro KujoӨдрийн өмнө

    51B people? i thought there was only 7B

  • Pete Kittycat
    Pete KittycatӨдрийн өмнө

    Those dislikes were from the people who made centrifuges

  • Strato Side
    Strato SideӨдрийн өмнө

    what do they use to seal up the capillary after drawing the blood? and how do they get to the middle of the capillary to get the malaria infected blood cells? is there more detail on how this is actually used step by step?

  • DuckGamesNL/ DGNL
    DuckGamesNL/ DGNLӨдрийн өмнө

    <a href="#" class="seekto" data-time="69">1:09</a> fan girl mode activated

  • Yannic de Haan
    Yannic de HaanӨдрийн өмнө

    What if we can use this for Corona testing

  • Lamb Sauce
    Lamb SauceӨдрийн өмнө

    51 B TO 7B.....

  • Neva Niland
    Neva NilandӨдрийн өмнө

    What a buitiful MNlists video

  • Cooper Siebel
    Cooper SiebelӨдрийн өмнө

    Now I’m scared that I can diagnose myself with malaria

  • bexrei :3
    bexrei :32 өдрийн өмнө

    And yet I still cant buy this....

  • Geil Medic
    Geil Medic2 өдрийн өмнө

    this is uncomfortable watching in fullscreen to be honest

  • Brennan Carlson
    Brennan Carlson2 өдрийн өмнө

    <a href="#" class="seekto" data-time="110">1:50</a> wait so when i held a ladybug it's feet were actually hooks?

  • NamesRamen
    NamesRamen2 өдрийн өмнө

    This video shows that technology isn’t always the best choice for use in this situation

  • Timmy Barns
    Timmy Barns2 өдрийн өмнө

    But the real question is that can this see the Corona Virus.

  • Sabrina Lenting
    Sabrina Lenting2 өдрийн өмнө

    <a href="#" class="seekto" data-time="438">7:18</a> symbol 666

  • Video Dragon
    Video Dragon2 өдрийн өмнө

    Mark Rober: red blood cells, white blood cells, and platelets Me: I know I watched cells at work

  • CanadaBall
    CanadaBall2 өдрийн өмнө

    There’s only 7 billion people on earth so he can’t save 51 billion lives... unless.... ALIENS CONFERMED

  • JustaRandomGuy


    6 цагийн өмнө

    @La Chihuahua Bear No he didn't and if you watched the video you would understand why

  • La Chihuahua Bear

    La Chihuahua Bear

    7 цагийн өмнө

    CanadaBall he probably meant million

  • Newmanban2
    Newmanban22 өдрийн өмнө

    How do you dislike this

  • Gupa !
    Gupa !2 өдрийн өмнө


  • Methmal dhananjaya
    Methmal dhananjaya2 өдрийн өмнө

    These guys are giving biggest slaps to boomers that always knows about complaining to Younger generations.

  • Toshinori Yagi
    Toshinori Yagi2 өдрийн өмнө

    Me: time to study What i do: watch Mark Rober

  • Toshinori Yagi
    Toshinori Yagi2 өдрийн өмнө

    The thumbnail tho...

  • Ryso
    Ryso2 өдрийн өмнө


  • Aaron
    Aaron2 өдрийн өмнө

    <a href="#" class="seekto" data-time="195">3:15</a> is my my cereal a

  • KSP4Kids
    KSP4Kids2 өдрийн өмнө

    The amount of people that are confused about the 51B part angers me

  • Kathleen Tinker
    Kathleen Tinker3 өдрийн өмнө

    Manu being so fascinated with the little white thing in the water was adorable

  • Tristan MacLeod
    Tristan MacLeod3 өдрийн өмнө

    I like how degree holding 28. Year old men can make something that takes 3 days to make and cost 32k dollers and a 8 year old can make something for 50 cents and they made it for that sponge bob toy for 5$

  • Just a typical nobody
    Just a typical nobody4 өдрийн өмнө

    68 cents only 1 cent needed we were on the verge of greatness we were this close

  • Gamer Hc
    Gamer Hc4 өдрийн өмнө

    <a href="#" class="seekto" data-time="454">7:34</a> you see clear curiosity

  • Mayhem AND Friends
    Mayhem AND Friends4 өдрийн өмнө

    I love this channel it’s so fun to learn especially with you Mark Rober! 😊

  • Cooper Stevens
    Cooper Stevens4 өдрийн өмнө

    8 bil. Sorry i had to

  • Kevin Delgado
    Kevin Delgado5 өдрийн өмнө

    How do you save 51 billion lives when there are only 7.7 billion people world wide

  • RavensEpic


    4 өдрийн өмнө

    Bruh did u watch the video

  • Wintrr
    Wintrr5 өдрийн өмнө

    Your goated bro have a great day

  • shyam kumar
    shyam kumar5 өдрийн өмнө

    How to buy those equipments?😂

  • SuperJohn12354
    SuperJohn123545 өдрийн өмнө

    Sell these to science classes in Western Schools for $5-10 each , average class size 32 kids 32 x 5 , 32 x 10 = 160 - 320 @ 0.68 cent each , provides 235 - 470, Need + market = demand

  • Jason Elliot
    Jason Elliot5 өдрийн өмнө

    Everyone should watch this

  • REDxStep
    REDxStep6 өдрийн өмнө

    <a href="#" class="seekto" data-time="234">3:54</a> it senses depression and runs away

  • flight_time1
    flight_time16 өдрийн өмнө

    In the title it says how to save 51 billion lives. As though there is only 8 billion people that live in the world.

  • Spandana Myneni
    Spandana Myneni6 өдрийн өмнө

    This is amazing !!!! True hero !!!!!

  • chonky goose time
    chonky goose time6 өдрийн өмнө

    This could help fight covid-19 its cheap and its easy to use for finding covid-19 in water

  • Daniel Cruz
    Daniel Cruz7 өдрийн өмнө

    There is only 7 billion people Mark rover: I SAVED 51 BILLION PEOPLE Roblox: I give probably double the peeps entertainment ha

  • gumbwoiii
    gumbwoiii7 өдрийн өмнө

    did he say telescope

  • king kong
    king kong7 өдрийн өмнө

    Sometimes people dislike a video just for the sake of disliking why else would someone dislike this

  • Naw Naw
    Naw Naw7 өдрийн өмнө

    <a href="#" class="seekto" data-time="66">1:06</a> = Death now

  • Zyrene Felizardo
    Zyrene Felizardo7 өдрийн өмнө

    Where to buy that

  • Michael Truong
    Michael Truong7 өдрийн өмнө

    “I’ve never looked at my blood before” *finds out he has malaria*