Why Are You Alive - Life, Energy & ATP

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At this very second, you are on a narrow ledge between life and death. You probably don’t feel it, but there is an incredible amount of activity going on inside you. And this activity can never stop.

Picture yourself as a slinky falling down an escalator moving upwards - the falling part represents the self replicating processes of your cells, the escalator represents the laws of physics, driving you forwards. To be alive is to be in motion but never arriving anywhere. If you reach the top of the escalator there is no more falling possible and you are dead forever.

Somewhat unsettlingly, the universe wants you to reach the top. How do you avoid that and why are you alive?

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  1. Kurzgesagt – In a Nutshell

    Kurzgesagt – In a Nutshell


    You want to learn more about science? Check out our sciency products on the kurzgesagt shop - all designed with love and produced with care. Getting something from the kurzgesagt shop is the best way to support us and to keep our videos free for everyone. ►► kgs.link/science (Worldwide Shipping Available)

    • Thạnh Phạm

      Thạnh Phạm

      19 napja

      Stupid science, doesn't know Carnivorous lions live only 14 years. The us eats too much animals meat, causing 600, 000 deaths from the virus

    • Thạnh Phạm

      Thạnh Phạm

      19 napja

      Stupid science, doesn't know Carnivorous lions live only 14 years. The us eats too much animals meat, causing 600, 000 deaths from the virus

    • Trey B

      Trey B


      So it makes a lot of sense when ppl say always keep going forward

    • Thạnh Phạm

      Thạnh Phạm


      A lot of money for what ??? The west has the most money in the world, died of the world's most virus. The United states uses the most vaccines in the world. In the United states 595,000 people died from the virus. North is the poorest country in the world. North Korea there is no vaccines money. North no people died from the virus

    • Thạnh Phạm

      Thạnh Phạm


      Stupid science Science doesn't know Sunlight produces wood. The leaves absorb photons converted to electrons -- and positrons + Leaves use 918 positron + attracts 917 electron -- create proton + Leaves use 918 positrons + that attract 918 electrons -- creating neutrons The leaves use 6 protons + attracts 8 neutrons to attract 6 electrons -- creating carbon ( C5H10 o5 cellulose )

  2. Hikari White

    Hikari White

    12 órája

    Omae wa mou shindeiru. お前はもう死んでいる。

  3. IC


    21 órája

    "Universe wants you to reach the top". Thanks, day starts good, but i open yur video. Anoth.

  4. funnygrunt



    Dude that dab was too big for this

  5. Gamieplays



    0:00 I finally found the meme !

  6. Mohammad Darwaze

    Mohammad Darwaze



  7. XinHui Li

    XinHui Li


    “All life is traced back to this one cell” Oh, hi cousin :)



    2 napja

    Amazing thank for tge idea to consider life and death in a different way.

  9. Khalyl Resendiz

    Khalyl Resendiz

    2 napja

    Taste the SUUUUN

  10. Its no one presents

    Its no one presents

    2 napja

    0:00 -> 0:06 this is a meme

  11. Ice_Wallowkome


    2 napja

    5:14 anime betrayals eyyyyy!!!!!!

  12. bona pasogit

    bona pasogit

    2 napja

    Dari sisi sains, Hidup itu terlalu kompleks, sehingga memerlukan Arsitek Agung untuk mewujudkan nya . Ironisnya kita individu sering merasa hidup ini tidak berharga

  13. tuyen pham

    tuyen pham

    2 napja

    rất hay very good

  14. Abdullah K.

    Abdullah K.

    2 napja

    Wow the videos are getting more and more awesome with those memes and anime quotes LOL loved it!

  15. Copyright Invalid

    Copyright Invalid

    3 napja

    "Why are you alive?" I don't know I ask mysef that question all the time.

  16. •Eijiro Kirishima•

    •Eijiro Kirishima•

    3 napja

    this is like the biology version of "history of the entire world, i guess" and I'm here for it

  17. T MM3

    T MM3

    3 napja

    So what I am hearing is that the Universe iiiissss conspiring against me

  18. Sir Uranos

    Sir Uranos

    3 napja

    Like the video; You know it deserves it.

  19. u just rickrolled

    u just rickrolled

    3 napja

    wish my school is like this channel

  20. KyoSohma _

    KyoSohma _

    3 napja

    This is the best video ive seen so far, all the references keep getting so much better. I have been laughing way too much at this

  21. tomthebuilder


    3 napja

    0:05 I like to live life on the edge

  22. theeaglelandsatmidni


    4 napja

    But wait what happens if you reach the bottom of the escalator

  23. Carlos Rodríguez Solís

    Carlos Rodríguez Solís

    4 napja

    I love so much the Pokémon references in your videos! Like 6:18

  24. First Name Last Name

    First Name Last Name

    4 napja

    Some cell didnt eat another cell and now I have to be alive. What an asshole

  25. Morgan Dillard

    Morgan Dillard

    4 napja

    what happens if you hit the bottem would you live forever?

  26. Yuta


    4 napja

    Imagine if this channel actually covered most of the topics ( or all) of human anatomy & physiology. That would be so cool !

  27. garrett vaughn

    garrett vaughn

    4 napja

    4:01 Gordon Ramsay: THIS ENERGY IS F*@$% RAW!!!!

  28. MWB Gaming

    MWB Gaming

    4 napja

    ATP: supercapacitor Glucose: Gasoline

  29. De gamr

    De gamr

    4 napja

    Damnit I wanted to be the very dead part of the universe,screw cells

  30. Titan Yhanos

    Titan Yhanos

    5 napja

    Wait.. what ?, Cell can speak Omaewa Mo Sindeiru ? Nani..? That's is old & Legend joke, nice..

  31. AquaLady


    5 napja

    Why fear the stopping slinky?

  32. minecraft sucks

    minecraft sucks

    5 napja

    This made poeple depressed

  33. Cake in Space

    Cake in Space

    5 napja

    8:23 WTF

  34. TrainLover 106

    TrainLover 106

    5 napja

    Everything uses ATP? Oh wow everything is related to a train with Automatic Train Protection.

  35. Pendragon


    5 napja

    "why are you alive?" Thats a good question and yes I dont know.

  36. Shaggyone789


    5 napja

    The things that had to transpire for you to be here are mind boggling. It literally is a miracle that you are here watching this video.

  37. Rav H

    Rav H

    5 napja

    Ty God for letting me be alive

  38. KIRA


    6 napja

    My son : tell me a longass story dad Me(future) : It all started when a cell decided to separate itself from the universe so it could do it's own thing for a while.

  39. Dark Angel

    Dark Angel

    6 napja

    I like animation..

  40. le me Otaku

    le me Otaku

    6 napja

    The video answers "How are you alive?" Ask the cosmos "why" are we alive, our reason, our existence and this conscios. I, have the answer.

  41. B787 lover

    B787 lover

    6 napja


  42. Ray Alexander

    Ray Alexander

    7 napja

    Idk about you guys but im alivr because of cheap rubber

  43. Nevin


    7 napja

    i strongly disagree that we came from a single cell or animals rather we came from Adam and eve.

  44. Nevin


    7 napja

    to serve God and establish deen.

  45. Rowe Ozzie

    Rowe Ozzie

    7 napja

    The colossal mouse metabolically inject because pisces independently clear circa a ordinary mandolin. living, smoggy ceiling

    • Sodacat 30

      Sodacat 30

      6 napja

      Where are ya where did ya start the day where you I gotta go to the game I love ya I love the video and you can go to crush and get a great time with your Twitter is your Twitter day and I gotta go where are you where where did ya start this game and where are going I don’t want you gotta is where we gotta I like the game where we gotta was a game day where I can get the same thing to go to get a Twitter

  46. st1220


    7 napja

    0:00 @ this very 2nd u r on a narrow ledge between life & death

  47. poop poop

    poop poop

    7 napja

    when you speak back to the teacher but she's not sure who said it 0:00

  48. Nathan Ozimec

    Nathan Ozimec

    8 napja

    I’m sorry t

  49. Raoof Sedeqey

    Raoof Sedeqey

    8 napja

    This video was so much deeper than most... loved it

  50. DoDo Donut

    DoDo Donut

    8 napja

    yeah but what happens when the slinky gets to the bottom of the escalator

  51. Loaaf


    8 napja

    You should make an enamel pin of the spring from this video

  52. Tomáš Kamenský

    Tomáš Kamenský

    8 napja

    5:00 I nearly couldn't handle the laughter and appreciation for this channel. I love you guys. Thanks

  53. Doriflash Animations

    Doriflash Animations

    8 napja

    You have gotten 100 IQ

  54. Not Clickbait Productions

    Not Clickbait Productions

    9 napja

    What happens if you reach the bottom of the escalator?

  55. Laurensia


    9 napja

    This channel is the best education channel, not only the animation is great, the lesson is also very easy to understand

  56. AARIZ Gamer

    AARIZ Gamer

    9 napja

    God create us and the universe. Ever think about how does the first human exist?

    • AARIZ Gamer

      AARIZ Gamer

      9 napja

      It's not natural and god create us and make human can make other human ( like born other human )

  57. Daniel Cho

    Daniel Cho

    9 napja

    What if you reach the bottom of the escalator in 0:20?

  58. Arcay


    9 napja

    wow.... this is the best educational content I've ever seen... 💖💖💖💖

  59. y0tub


    9 napja

    You are the best



    9 napja

    Thank you very much

  61. Extra $Income, Money Making Online

    Extra $Income, Money Making Online

    9 napja

    Did anyone else see the monkey in the intro eat a slinky

  62. Leila Mangos

    Leila Mangos

    10 napja

    please make a video on entropy!!! it sounds so interesting

  63. Erik Brandsma

    Erik Brandsma

    10 napja

    Is the Entropy video still coming? 1:35

  64. Rahul Sukare

    Rahul Sukare

    11 napja

    Life is becoming more and more interesting after I got this channel 🏞️🦠🌌 Great Knowledge........ Feel the life just the way it is🧬🧬 🧬

  65. Anas Nassim

    Anas Nassim

    11 napja

    We’ve studied this in school but not as close as this video was entertaining. The crips cycle and the mitochondria and the matris

  66. Bec Taddeo

    Bec Taddeo

    12 napja

    The boundless piano behaviourally laugh because wren climatologically fix than a blue yogurt. swift, humdrum fireman

  67. Bad Bunny275

    Bad Bunny275

    13 napja

    Ah yes, the mitochondria, it is in every science flash card ever

  68. Potato Rat

    Potato Rat

    13 napja

    Never in my life did I think a Kurzgesagt video would motivate me and not give me any existential dread

  69. Quoc Tuan Huynh

    Quoc Tuan Huynh

    13 napja

    9:06 " Flappy bird reference "

  70. 『• Nøt Aøi •』

    『• Nøt Aøi •』

    14 napja

    Me: *swings chair in class* My teacher: 0:01

  71. Nathan Foskett

    Nathan Foskett

    14 napja

    WHAT!?!?! CELL IS EVOLVING? lol dude that was f****** legendary! Had to drop that pokemon swag 😎💪💯

  72. Enrique L. Chavez

    Enrique L. Chavez

    14 napja

    That ending was beautiful, "making a dead universe much more interesting."

  73. chaitanya saraf

    chaitanya saraf

    14 napja

    "Mr Duck I don't feel so good" 😭😭😭😭😭😭

  74. Esdeath ML63 5.5 Biturbo

    Esdeath ML63 5.5 Biturbo

    15 napja

    I love this channel ❤

  75. yoy


    15 napja

    to defeat entropy*

  76. Yūichirō Hyakuya

    Yūichirō Hyakuya

    16 napja


  77. ohmyethan


    16 napja

    the cell didnt wanna eat the other cell now we gotta go to school? smh

  78. CFD and Freeride

    CFD and Freeride

    16 napja

    The animations look like the game Spore! Nice!

  79. Shyla Giroux

    Shyla Giroux

    17 napja

    The literate poison implicitly reflect because picture symptomatically educate past a wry balinese. loving, resonant vietnam

  80. justcallmedoggie


    17 napja

    "You will merge with the dead Universe again, maybe you'll tell it about your adventures" No ones talking about this line, but i think, this is gotta be the cutest way to talk about dying

  81. Sergio M.S.

    Sergio M.S.

    17 napja

    9:40 are you Duolingo?

  82. Paul Hartman

    Paul Hartman

    17 napja

    I take nicotinamide mononucleotide, NMN, to maintain my cellular energy. Maybe you could do a video on it.

  83. Zelda Dude

    Zelda Dude

    17 napja


  84. FuegoIron 278

    FuegoIron 278

    17 napja

    so remember: the mythocondria is the powerhouse of the cell

  85. Xaphiron McBryde

    Xaphiron McBryde

    18 napja

    *The dislikers were religious people*

  86. Ainlex Levitani

    Ainlex Levitani

    19 napja

    Me: *Takes a short break* Also me: *Dies*

  87. Tyler C

    Tyler C

    19 napja

    Could we give an injection of ATP instead of using defibrillators for cardiac arrest to get things going again???

  88. Jit Boy

    Jit Boy

    20 napja

    the universe is not dead lol its very much alive

  89. DanielGamer2467


    20 napja

    that name is in Magyar if im correct

  90. Trav James

    Trav James

    20 napja

    There's a lot of "we dont knows" in this video. So just call it a theory

    • Derek Ellis

      Derek Ellis

      19 napja

      That isn't what a theory is, and we have evidence for alot of this. What are you proposing though?

  91. doggodiggin


    21 napja

    ANIME BETRAYAL i started laughing

  92. Domi B.

    Domi B.

    21 napja

    5:12 Imagine what the dude thought while reading that.

  93. Xx softplanet xX

    Xx softplanet xX

    21 napja

    Planets need solar rediation

  94. Gaz 955

    Gaz 955

    21 napja

    Can some one explain the amine betrayal thing I don't get it

    • Derek Ellis

      Derek Ellis

      19 napja

      It's an older meme from I think 2019

  95. Finn


    21 napja

    One of the apes in the intro had a slinky instead of whatever they normaly have

  96. Indrid Cold

    Indrid Cold

    21 napja

    White is a virus? Is it alive? It is not cellular. Is it just a strand of DNA that hijacks the host's DNA?

  97. Benjamin Lam

    Benjamin Lam

    22 napja

    Why has nobody said this the captions at 7:44 "Teaser of Kurzgesagt:Science War, coming in 2021"

  98. Paula Nocu

    Paula Nocu

    22 napja

    I learned more from this than my science teacher taught me in 5 years

  99. Jeni Xavier

    Jeni Xavier

    22 napja

    The lean flute excitingly present because sweater pharmacologically pull behind a ludicrous staircase. large, known peony

  100. Anonymus


    22 napja

    4:19 Now you can eat sunlight!