SciShow explores the unexpected. Seven days a week, Hank Green, Michael Aranda, and Olivia Gordon delve into the scientific subjects that defy our expectations and make us even more curious!
Sundays - Learn about the amazing topics we can't quite make a stand-alone show about in SciShow List Show!
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Wednesdays - Hank or Michael dives deep into a long-form Infusion episode, or an unscripted talk show or quiz show with a guest!
Thursday - Another new dose about the wonders of the world.
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Don't forget to check out our sister-channels SciShow Space, SciShow Psych, and SciShow Kids!

The Male Biological Clock
Poor, Misunderstood Poison Ivy
I Can't Believe It's Not Wood
Why Do Humans Like to Get High?
How Big Can Black Holes Grow?
How Tall Can Mountains Get?
Why Scurvy Shouldn't Exist
  1. Ana Pruneda

    Ana Prunedaپیش 4 ثانیه

    Why you don't say mother and woman, and instead say parent and person? That's confusing. Only women get pregnant....

  2. Origami and Cats

    Origami and Catsپیش 3 دقیقه

    But it makes sense sort of because it's dealing with uncertain moving parts instead of stuff that just sits there. And if something is moving it's moving through time isn't it?

  3. Godless Melanisia

    Godless Melanisiaپیش 3 دقیقه

    Not going to mention botox?

  4. Captain_Cupcake

    Captain_Cupcakeپیش 7 دقیقه

    Polyextremeophiles: giving the middle finger to the impossible since whenever evolution decided these were a good idea.

  5. Jay Xan

    Jay Xanپیش 9 دقیقه

    Death stranding got rain right with time fall it seems

  6. jamesw242

    jamesw242پیش 10 دقیقه

    I lick it

  7. Erik Karlsson

    Erik Karlssonپیش 11 دقیقه


  8. Gene Hawkridge

    Gene Hawkridgeپیش 17 دقیقه

    Fungus spores, too!

  9. Vannic Wolf

    Vannic Wolfپیش 19 دقیقه

    Anyone know about Chinas artificial moon(s) they are installing for public safety at night? Look it up. Freaky.

  10. Samuel Orth

    Samuel Orthپیش 19 دقیقه

    This feels like something the History channel would produce

  11. Aether

    Aetherپیش 26 دقیقه

    I was aware of triple chromosome combinations and intersex for a while, and this helped clarify some stuff. Although, aren't these genetic differences deformities, and not new sexes? I'm all for awareness and making sure these people get the help they need if they need it, but claiming that these are new sexes seems a bit drastic. If anything it would be a sort of binary spectrum, where most people are closer to the opposing extremes, male and female, with some of the population closer towards the center, right?

  12. Tim Sullivan

    Tim Sullivanپیش 29 دقیقه

    As he disdainfully watches a 507 yr old Ocean Quahog pigging out on a single O2 molecule, Immortal Jellyfish (to himself): "Kids today - no manners!"

  13. Ibhenriksen

    Ibhenriksenپیش 30 دقیقه

    You can make bed bugs come out of their hiding space by using a blow dryer. If you raise your thermostat to 90 degrees they also come out so you can kill them that way. But be careful, that could cause them to scatter everywhere. Best to let the pros handle it.

  14. Aramis419

    Aramis419پیش 35 دقیقه

    Coral "reeves"? There's an opportunity for a meme here!

  15. Cornell Waters

    Cornell Watersپیش 35 دقیقه

    🔭 Thank You!

  16. Epicc Potato

    Epicc Potatoپیش 36 دقیقه

    Actually, if you live in the UK its gray😂🤦‍♀️

  17. Just Ashlee

    Just Ashleeپیش 36 دقیقه

    Time to get some money✌🏼

  18. Joe Hillmeyer

    Joe Hillmeyerپیش 36 دقیقه

    LSD was discovered the same way the first two were. Accidentally licking unwashed hands

  19. Charles Crowell

    Charles Crowellپیش 41 دقیقه

    Oh, hairy fart woman is really hot!

  20. Christopher Aizen

    Christopher Aizenپیش 43 دقیقه

    I'm surprised there isn't a video game on this location

  21. ccinndierella9

    ccinndierella9پیش 45 دقیقه

    Ragweed I understand you can't get away from even far into ocean and high up. Possibilities of things that cause us harm... hmm geoengineering...aluminum, strauntun and barium. Forget the natural stuff. Let's deal with the purposed. What are they doing in process of what they "say" they are doing. "Really?" What does a body good...NOT! Those 3 ingredients.

  22. Tigerous

    Tigerousپیش 47 دقیقه

    Get pregnant by the rain

  23. Johnathan Weaver

    Johnathan Weaverپیش 48 دقیقه

    There is a super tunnel from somewhere near kansas that goes to a underwater city that is payed for by our tax dollars almost 100 miles off the coast of Ca

  24. Nal

    Nalپیش 50 دقیقه

    Microbe Rain Some Stay Dry

  25. FeiraDragon

    FeiraDragonپیش 52 دقیقه

    Heat burst sounds like it should be a pokemon move tbh.

  26. TurboCMinusMinus

    TurboCMinusMinusپیش 52 دقیقه

    Novel biological chemical processes might be able to transmute elements. How much energy does it take to kick your front door in? Now how much energy does it take to open it with a key? In this case the key could be just the right combination of molecules which would naturally slot 1 nucleus extremely close to another. Some other chemical or electrical process could complete the work. I would agree however it would be unlikely to work on gold, or move any neutrons. But look at anecdotal evidence involving chickens, magnesium and calcium for a possible example of biological transmutation. In that case it's likely Mg-24 + O-16 -> Ca-40.

  27. Dennis Enns

    Dennis Ennsپیش 55 دقیقه

    Hair 🤮

  28. Ben Petranek

    Ben Petranekپیش 55 دقیقه

    how would the effects of nuclear bombs affect this cloud of bacteria in the atmosphere?

  29. cRAVEtrance

    cRAVEtranceپیش 58 دقیقه

    I was literally wondering this just yesterday! Thank you SciShow!!!

  30. Piper A R

    Piper A Rپیش 58 دقیقه

    You can't always tell north by moss on trees. But the sun always rises in the east and sets in the west. Keep walking towards the sun and you're going to be ok.

  31. Asterizen

    Asterizenپیش 58 دقیقه

    Who is this man? What happened to the other dude?...

  32. keiichiiownsu12

    keiichiiownsu12پیش ساعت

    Are there biological organisms that can, like, live in the air?

  33. Poot Poot

    Poot Pootپیش ساعت

    The title sounds like a part of a pick up line

  34. Jon Bierwirth

    Jon Bierwirthپیش ساعت

    Seriously what is up with all the Bee jokes in this comment section 😂

  35. AquaGucci

    AquaGucciپیش ساعت

    I just got my 4 shots today

  36. Brand Snowyee

    Brand Snowyeeپیش ساعت

    I use these back scratcher set to solve my back itch issue which can buy on Amazon

  37. Monty Cantsin

    Monty Cantsinپیش ساعت

    Ok, you can panic now.

  38. Tim Sullivan

    Tim Sullivanپیش ساعت

    (03:55) "...and let us know if you learn anything REALLY cool in the comments." Not likely - unless you MEANT to say, "And let us know, in the comments, if you learn anything REALLY cool." So maybe, after all, there IS something to learn in the comments: "HOW we said it = WHAT we said". Syntax matters.

  39. Jessica Earnhardt

    Jessica Earnhardtپیش ساعت

    honestly, in my opinion, the only good reason to not be vaccinated is if your system literally can't handle it, like having a compromised immune system.

  40. Nicholas Feeley

    Nicholas Feeleyپیش ساعت

    The Expanse series, book 4. It's a big thing for a good chunk of said book. (A really good series as well. Highly recommended.)

  41. horrorkesh

    horrorkeshپیش ساعت

    If desertification is involved in serving me desert I'm in

  42. Joseph McCafferty

    Joseph McCaffertyپیش ساعت

    This could be why many royalties had such horrible rulers, both bad moral and poor leadership. Since the king would be king for life, he probably would have many children who would develop those defects, along with being pampered and not gain the experience to lead a country. But hey, that's just a... assumption.

  43. Justin Spratt

    Justin Sprattپیش ساعت

    Not an argument: "There are exceptions, therefore, it *is* a 'spectrum'."

  44. Huda Omran

    Huda Omranپیش ساعت

    Can you do an episode about micro plastics please.

  45. Humanity

    Humanityپیش ساعت


  46. william x gaming

    william x gamingپیش ساعت

    Lmao. How tf can atheists actually believe that the world is 4 Billion years old? I am a Christian and God made the universe not even 10,000 years ago. READ THE BIBLE

  47. Megan McCarthy King

    Megan McCarthy Kingپیش ساعت

    I want to put a leash on her nose slave ring.

  48. Dave Johnson

    Dave Johnsonپیش ساعت

    That's weird because I was wondering about this the other day

  49. Charles Talhelm

    Charles Talhelmپیش ساعت

    Micro Brain?

  50. BuletPrufe

    BuletPrufeپیش ساعت

    For anyone upset that there's no longer an annotation or video clicky thing there, here's their bath salts video:

  51. Cthulhu Has Risen

    Cthulhu Has Risenپیش ساعت

    This is why I like scishow space better, not so much doom n gloom.

  52. J D

    J Dپیش ساعت

    Just here to comment that the thumbnail is prime 👌

  53. franscesca lewars

    franscesca lewarsپیش ساعت

    i love how he presents

  54. Anita Poupa

    Anita Poupaپیش ساعت

    I am someone that is relatively fit and I was always doing sport growing up but literally every time I jog/run I get a freaking stitch. Sprints don't usually trigger it, but warming up on the elliptical machine at the gym ("low impact") always triggers it no matter when I last ate or drank. My organs just say no oh god please stop why are you doing this

  55. Damien Phillips

    Damien Phillipsپیش ساعت

    "ten to thirty cases of c. botulinum are reported each year in the U.S." and i bet you most of them are from my boy steve1989mreinfo getting exposed to some gnarly old rations. god bless that man.

  56. Katie Twyman

    Katie Twymanپیش ساعت

    Sometimes I think y'all title these videos just to freak John out.

  57. Technicolor Dojo

    Technicolor Dojoپیش ساعت

    Thanks for reinforcing my phobias.

  58. Adam Triplett

    Adam Triplettپیش ساعت

    Are Christopher and Coral Reeves related?

  59. Atchy

    Atchyپیش 2 ساعت

    Why does the video kep calling me a micro brain? >.>

  60. Brooke Ledbetter

    Brooke Ledbetterپیش 2 ساعت

    Im craving ice im also 33 weeks pregnant the nice cold ice is so amazing i got a 10 lb bag of ice from the sonic and its almost gone I feel crazy!

  61. Luboman411

    Luboman411پیش 2 ساعت

    Fascinating that flus aren't big culprits. Lest we forget, it was the Spanish flu that ended up killing almost 100 million people in 1918. And it's been bird and pig flus that have sacred the bejesus out of modern people these past two decades, along with ebola from tropical Africa...

  62. SoberRS

    SoberRSپیش 2 ساعت

    If you dont go outside the rain cant touch you..

  63. Craig Corson

    Craig Corsonپیش 2 ساعت

    That's an incorrect pronunciation of the plural for "reef", Olivia. It should be "reefs", with the F pronounced like an F. A reeve is something else. reeve /rēv/ historical a local official, in particular the chief magistrate of a town or district in Anglo-Saxon England. Canadian the president of a village or town council.

  64. Alex Hern

    Alex Hernپیش 2 ساعت

    What about the manganese rain that's been sprayed over black neighborhoods?

  65. Paper Plate

    Paper Plateپیش 2 ساعت

    Do an updated video please.

  66. fkovacs1

    fkovacs1پیش 2 ساعت

    Well THAT was a depressing video.

  67. DoubleIrish DutchSandwich

    DoubleIrish DutchSandwichپیش 2 ساعت

    Fun Fact: Fred Hoyle thought humans evolved there noses with holes on the bottom to prevent consuming viruses from space

  68. _*FlamingGOAToB*_

    _*FlamingGOAToB*_پیش 2 ساعت


  69. Jack Messina

    Jack Messinaپیش 2 ساعت

    Lol this video came out right after Dream posted “Minecraft but it’s raining monsters”

  70. fidelio

    fidelioپیش 2 ساعت

    and here i thought kawasaki disease left skidmarks

  71. Warmage Two Crows

    Warmage Two Crowsپیش 2 ساعت

    This is a favored subject for me.

  72. DZ@J

    [email protected]پیش 2 ساعت

    Yes, let the microbes rain!! If spiders and frogs can fall from the sky, it's totally believable for microbes to be the same.

  73. Generic Username

    Generic Usernameپیش 2 ساعت

    Come on really? Apocalyptic situation: It'll be made worse by climate change You dont honestly expect me to believe the current climate is the ideal climate and any deviation from that only creates negatives. The earth has been a lot colder and a lot hotter throughout history. There's going to be pros/cons with any change, not just cons. Im guessing "climate change will fix this problem" does not mesh well with the narrative.

  74. grodenbarg

    grodenbargپیش 2 ساعت

    "Birds of a feather, flock in the pack. You can't fight the government, and paint a cloud black. So it is written, so it is done, the writings on the wall, the hand's got a gun. So it is destined, so it is sealed, the tree falls in the woods, we're all left in the field." --Kiss The Dream--by QED. Obvious what this song lyric excerpt are are hinting about here.... (cough,chem-trails, cough,cough)

  75. Baruk Israel

    Baruk Israelپیش 2 ساعت

    The effects... Full Video!


    LAMOND HAUGHTONپیش 2 ساعت

    Death stranding type rain .. there is death standing in the rain

  77. KeiranBro

    KeiranBroپیش 2 ساعت

    *Smokes the sticky trichomes

  78. The Rogue Wolf

    The Rogue Wolfپیش 2 ساعت

    Me: "I'm sick of this rain." SciShow:

  79. DragonSheep

    DragonSheepپیش 2 ساعت

    We're surrounded by microbes all the time. And that's OK.

  80. Tyler

    Tylerپیش 2 ساعت

    Oh, okay you’re talking about intersex people not gender identity. Cool beans, y’all need to chill out.

  81. T J

    T Jپیش 2 ساعت

    There's only two genders.

  82. XSportSeeker

    XSportSeekerپیش 2 ساعت

    Yeah... I love the smell of burning plastics and Australian brush fires in the morning -not.

  83. Maphisto86

    Maphisto86پیش 2 ساعت

    "Armageddon is not going to happen anytime soon . . . yet."

  84. Pixel Perfect Entertainment

    Pixel Perfect Entertainmentپیش 2 ساعت

    Yup. Still two sexes. People who are born with biological sex anomolies and within there there is a spectrum. This doesn't change anything we previ3know. The only thing that should change is the awareness of "intersex" folk. Lets not make all of this what it isn't.

  85. Korstmahler

    Korstmahlerپیش 2 ساعت

    MICROBE RAAAAAIN (I lean away from the microbes to inhale)

  86. Chris Gamboa

    Chris Gamboaپیش 2 ساعت

    I've read upon increasing pheromones is increasing testosterone levels, supplement with zinc and dhea because both connect with testosterone and not using soap in showers

  87. Muhammad Ali Eesaa

    Muhammad Ali Eesaaپیش 2 ساعت

    You're looking young, how old are you?

  88. dumkof nici

    dumkof niciپیش 2 ساعت

    Coral reeves

  89. Wendy Gold

    Wendy Goldپیش 2 ساعت

    If melanesians are 6% "archaic" that means great great grandpa was "archaic" and momma was one quarter. Yup not so archaic.

  90. ReginaFera

    ReginaFeraپیش 2 ساعت

    So just how much does this freak John out?

  91. Mike S

    Mike Sپیش 2 ساعت


  92. SQUACK

    SQUACKپیش 2 ساعت

    Great speech on the religious aspects of vaccination

  93. BoringNEET

    BoringNEETپیش 2 ساعت

    Well in the future maybe facemasks will become like shoes, something everyone wears outside.

  94. LiziLLusioN

    LiziLLusioNپیش 2 ساعت

    So you’re saying that..... my self-Defense mechanism.... Is to flail around and squeeze my tiny stick of a body out of my aggressor’s grasp?

  95. Noah

    Noahپیش 2 ساعت

    Stop reading my thoughts please

  96. my youtube

    my youtubeپیش 3 ساعت

    I've watched this twice now and what I hear is that your claiming that people with biological deformities would would then create a new type of sex. While this maybe a possibility if the numbers were higher and not less the 1% of the population. For example. Some people are born with extra digits we then don't qualify that with saying there's a spectrum of fingers and toes humans have. We give them medical definition, and if we're lucky we find the underlying cause of the for that condition to maybe stop it from passing on. What it seems like you're doing here is taking deformities in trying qualify them. It seems like there is a political slant to you are presenting here. I'd like to be wrong about this but I can't see it any other way.

  97. Anux

    Anuxپیش 3 ساعت

    0:50 Oil companies cause autism.

  98. Le Quasar

    Le Quasarپیش 3 ساعت

    God.... Did a man put a baby in that stuff...?

  99. Andy Fromm

    Andy Frommپیش 3 ساعت

    You lost me at "climate change"

  100. Mike James

    Mike Jamesپیش 3 ساعت

    Can we please throw in a few opinions with our "Science?" "Scientists think" , "probably getting worse", "There could be soon".....ahhh that fits my agenda, thank you. What happened to this channel, we used to get SCIENCE.