8 Truths and Myths About the Full Moon

  • Published on Jan 12, 2020
  • With so many claims about the moon’s influence over everything from menstrual cycles to rainfall, SciShow is here to set the record straight with these 8 truths and myths about our moon.
    Hosted by: Hank Green
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Comments • 917

  • Elizabeth Darsey
    Elizabeth Darsey Hour ago

    I always think this is an interesting topic to bring up. I know a good number of people who have no belief in unexplained events from things like the moon causing issues all the way to paranormal events. Yet many of them who are in medicine/ems say that while no one can explain it, the oddest and most bizarre shifts they work are on full moons. Most went into their fields initially feeling ‘full moon’ as a cause was myth. Yet they came to find that they do see a correlation. But it always stands out to me when very practical, science-minded professionals admit there’s something that happens during full moons!

  • Jon Cocks
    Jon Cocks 2 hours ago

    There's something about Mary

  • Myriaddsystems
    Myriaddsystems 5 hours ago

    "Orient" is not a verb, please stop treating it as such. "Orientate" is the correct term, you are obviously aware of this as you said "orientated". Please stop mangling the English language. Thank you.

  • Miles Lougheed
    Miles Lougheed 8 hours ago

    Oh, when they do it it's called an underwater snowstorm. When I do it, my wife tells me to sleep on the couch.

  • Jodie Callaghan
    Jodie Callaghan 15 hours ago

    As a Cairns local, born and raised next to the Great Barrier Reef I can confirm it is NOT called the "Annual Sex Festival" 🤣🐠🐟

  • Jeann van Rooyen
    Jeann van Rooyen 15 hours ago

    Yes, a lunar rythm... we can't sleep, because, your body is telling you... SOMETHING IS GOING TO SUCK YOUR BLOOD!

  • Boogie Man80
    Boogie Man80 18 hours ago

    That`s dirty trick to lure people: put something sexually-related in thumb picture.

  • Demcheck
    Demcheck 22 hours ago

    Objectively, my cat goes CRAZY when it's full moon.

  • Jeff Mullins
    Jeff Mullins 23 hours ago

    Not a myth. I've worked in call centers for 14 years and people get crazy during a full moon. I know people in the medical care field and they say their patients are whacky too.

  • OXOTNHK aka D3ath Patr0l

    Ovaries....ON THE MOOOOOON

  • iafozzac
    iafozzac Day ago

    What about hair growing faster or slower depending on the moon phase of the time it was last cut?
    That one is a pretty popular myth here in Italy

  • InformalNarwhals

    hank: do full moons trigger seizures?
    me: * slight panic *
    video: myth
    me: * relieved *
    hank: but they do happen more often on the last quarter and darker nights and are somehow linked to lunar cycles
    me: * back to slight panic *

  • Alicia Gardner
    Alicia Gardner Day ago

    Sorry but I've been in healthcare for 20 years and I can attest that during full moons we see more incidents on those nights...just saying

  • Boi Mesa
    Boi Mesa Day ago

    Better not tell this to my girlfriend 😅

  • Norman Smith
    Norman Smith Day ago

    Grunion runs are affected by the moon. The grunion swawn only at the highest tides which are conteolk by the the moon. During the highest tide they run or in other words spawn. The eggs remain in the sand until the next high tide when they hatch.

  • rautermann
    rautermann Day ago

    Sorry to be pedantic, but these are MOON FACTS not FULL MOON FACTS. Bad title.

  • Forced2makethis Bloodyaccount

    I doubt the menstruation study took into account the widespread and common use of contraception. It would be harder to get a large number of women not using contraceptives. That would be the study I would read.

  • Limerence
    Limerence 2 days ago

    Circuluniary rhythms could explain why women's periods on average are on a 29 day cycle when the moon is also on a 29 day cycle. Obviously not every women get's their period on the full moon and not every woman has a 29 day menstrual cycle, it's just the average. But if you remove a woman's sense of time (take away all natural time tellers, clocks, sunlight, etc) her period will be thrown off so your natural body clock could use the phases of the moon to know when to do menstrual stuff. I don't know about the chimpanzees, maybe they just don't notice the moon or count in days instead.

  • H Smith
    H Smith 2 days ago

    Never dug in to police statistics then did you...

  • Regina Irene
    Regina Irene 2 days ago

    Ok, so you start out by saying a full moon doesn't affect people's behavior, and then immediately state it affects both the quality and quantity of sleep....which would directly affect human behavior. Am I missing something?

  • avinash bhujan
    avinash bhujan 2 days ago

    "Research actually has not found any connection". So does that mean it is definitely a myth? If you cannot prove something, does that automatically disprove it? You are implying that lack of evidence is evidence of nihility. Or does it mean that the research method is weak?

  • nebulaunfolding
    nebulaunfolding 2 days ago +1

    More babies are born under the full moon. Ask any experienced nurse in labor and delivery.

  • photondance
    photondance 3 days ago

    Okay. I’m comfortable with coincidences. Coincidi?

  • liam redmill
    liam redmill 3 days ago

    Superb new discoveries natural👍

  • Theodore Seeber
    Theodore Seeber 3 days ago

    Hmm- a solution to speed up corral evolution: Blue spotlights shining on the ocean all the time, triggering more sex parties, thus triggering hyperevolution for warming oceans.

  • Aislin King
    Aislin King 3 days ago

    Hank, I think those shirts clash a bit

  • FriendlyShark Ce
    FriendlyShark Ce 3 days ago

    I apreciate that they didn't gender the users of the menstrual cicle app. Thank you for not using gendered language for that!

  • Watermelon Warriors
    Watermelon Warriors 3 days ago

    Dung beetle: oh, dis is not so hard. Me: dats a weird looking poop ya got der

  • MrWombatty
    MrWombatty 3 days ago

    Why no mention of werewolves?

  • Watermelon Warriors
    Watermelon Warriors 3 days ago

    It would be cool and scary to be a werewolf

  • Jessikah I’m 2 F’ N REAL

    In the south when we see a couple pregnant women we say (must be a full moon) 🌕!!!!

  • Jessikah I’m 2 F’ N REAL

    Omg😱😱😱 you the guy I watched for 4 years to get my degree from college online!!!!! It was you!!!! Thanks luv your Biology 🧬 videos SAVED ME!!!!!! I PASSED MANY TESTS!!!!! ❤️❤️❤️ I’ll never forget your voice!!!!

  • Ken O
    Ken O 3 days ago

    Isn't the most obvious one, the origin of the words lunacy and lunatic?

  • RyanWake bradtelle
    RyanWake bradtelle 3 days ago

    if the menstral cycle is a couionsidance then why did it change

  • Sandman
    Sandman 4 days ago

    there is always a different outcome between science tests and practical real world. You are more likely to get people acting crazy on a full moon. Control ab tests will always alter the outcome

  • - { Nay } -
    - { Nay } - 4 days ago


  • Amanda Powell
    Amanda Powell 4 days ago

    If women did not have all the chemicals running through it, you would find a greater correlation with the moon cycle.
    Not that everyone will start and stop their cycle on the same day; but you can correlate a daughter's cycle from their mother's cycle.

  • AgeingBoyPsychic
    AgeingBoyPsychic 4 days ago

    10:30 Your moon seems to have a big chunk missing... Or is the grid pattern in front of the moon?

  • Funny Memes
    Funny Memes 4 days ago

    Annual Sex Festival is actually an underwater snowstorm...

  • Michal Grňo
    Michal Grňo 4 days ago

    Hank: Must be a full moon and-
    Also Hank: BUT!

  • Positron Decay
    Positron Decay 4 days ago

    3:23 That is so COOL!!

  • Lovely Doll Time
    Lovely Doll Time 4 days ago

    This video somehow reminds me of the Friday the 13th harvest moon in 2019.

  • kez kezooie
    kez kezooie 4 days ago

    This got me wondering about why scorpions would glow under UV light if it was something that put them in greater danger of predation. You'd think that natural selection would weed out this trait. Is there a metabolic reason for this trait? Is there something that is either beneficial or so necessary that it's let this trait survive?

    • SlyPearTree
      SlyPearTree 4 days ago

      Their predators do not see in UV, at least I don't think so.

  • dreadthedays says
    dreadthedays says 4 days ago

    If you watch the moon cycle you will bleed on the full moon. This is pretty well know in celtic communities to reduce period pain and shorten the days as drastic as 4 dsys less. You do not need to do anything other than be aware of the moons current phase. Nearly everyone I have ever challengeed to try this alignment do agree in the effects.

  • Kay Carle
    Kay Carle 4 days ago

    What about the belief that full-term pregnant women are more likely to go into labour on the full moon? I've heard some midwives say that's not true, but that there is a spike in women being admitted to labour units when there is a thunder storm. Thoughts?

  • CrunchyLikeness
    CrunchyLikeness 4 days ago

    I wasn't ready for Hank's shirt

  • Cat Poke
    Cat Poke 4 days ago

    The thumbnail is like a cryptic way of saying "The blood moon is rising..."

  • MultiRobotnik
    MultiRobotnik 4 days ago

    Water Bending.

    • bilias hour
      bilias hour 4 days ago

      its interesting when people say , its super small effect im sure it doesnt effect us ... but ... how do you know for sure?

  • Brian Steele
    Brian Steele 4 days ago

    Internal worms and parasites in the human body could be affected by the moons place in orbit. Causing them to release hormones in the body that could cause a disruption in the human hormones. This would cause erratic behavior if there was a over abundance of worms and parasites.

    • bilias hour
      bilias hour 4 days ago

      All of my EMT and police friends believe in the full moon bringing out the crazies. 😂

  • Chris Mcmullen
    Chris Mcmullen 4 days ago

    Wilder,weirder and harder to believe? A third of the oceans dying off? Animals loosing contact with the voice of God in these times. Where did the 'fallen one's fall from? Not that far away. Theres a reason people would be very uncomfortable with a very simple and understandable truth. The basis for what constitutes almost all of human knowledge is arrogance

    • aola wili
      aola wili 4 days ago

      night....especially in King's Cross Sydney...

  • Cats Are YES
    Cats Are YES 5 days ago

    Why is there a f*cking ovary on the moon in that thumbnail!

  • Caterfree10
    Caterfree10 5 days ago

    Clue is the best menstruation app bc it doesn’t force flowers on my nonbinary ass like every other period app on the App Store.

    • aola wili
      aola wili 4 days ago

      I must have miss- heard him when talking about creatures in Australia...I thought he said immoral trollops ...I've seen plenty of those doing the spawning thing on a dark moo

  • Frederic Louf
    Frederic Louf 5 days ago

    A vagina for thumbnail, somehow ? Should I understand that of all those eight stories, the menses' was the top relevant one or that the rough of a vajay's so much seemlier than that of a nudibranch ?

  • Jason Lueker
    Jason Lueker 5 days ago

    6:46? You said all scorpions, isn’t only venomous only?

  • bilias hour
    bilias hour 5 days ago

    Truth: Sailor Scouts fight evil by moonlight.

  • Private Person
    Private Person 5 days ago +1

    Where did you get the crime statistics ?
    When I charted the FBI reports of nation wide crime it was higher during the full moon. Less light polution back then.

  • Dreamweaver
    Dreamweaver 5 days ago +1

    I disagree. I work in an ER. Things are crazier on full moon nights, and that is consistent every month. We get more assaults and more psych patients than on other nights with the only acception being around the holidays those things are higher. But yeah, the full moon does affect human behavior.

    • J P
      J P 4 days ago +1

      I agree.
      My parents had several Taverns (one at a time at different locations) and I noticed that 4 days before a full moon there was an increased likeliness of a bunch of crazy bar stool jerks to get into a violent fight, especially when it was a Friday and pay day at the same time.
      Was it a coincidence? No I don't think so because it happened over many years always shortly before or on a full moon.

    • bilias hour
      bilias hour 5 days ago

      Hey, Tom Cullen, how do you spell "awesome"? M-O-O-N spells "awesome," laws yes!

  • Raffa Luisi
    Raffa Luisi 5 days ago

    Kos or some say Kosm

  • James Bond
    James Bond 5 days ago

    Perhaps more seizures occur under less moonlight because there would be more contrast between the darkness and headlights, flashlights etc...?

  • xoobo vola
    xoobo vola 5 days ago

    "chimps have a menstrual cycle of a whopping 39 days" me: mmm so I'm a chimp. That's nice.