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Let's Learn Everything!

Maximum Fun
Let's Learn Everything!
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139 episodios

  • Let's Learn Everything!

    106: The Polygraph & Dentistry History

    21/05/2026 | 1 h 58 min
    You may know the polygraph is junk science, but what is the real science of lying and what wild turns did the polygraph take to get to today? And how old is dentistry? If ancient cave men didn't brush why do I have to? Well it turns out for good reason, and some fascinating dental science.

    ALSO SEE US LIVE IN LONDON!!! LETSLEARNEVERYTHING.COM/LIVE

    Images we Talk About:  
    Mackenzie's First Polygraph
    Ancient Teeth Image
    Dentistry Tool 1
    Dentistry Tool 2
    Dentistry Tool 3
    Dentistry Tool 4

    Timestamps:

    (00:00:00) Intro

    (00:06:38) The Polygraph

    (01:00:33) Dentistry History

    (01:49:19) Outro

    Support us with a Max Fun Membership!

    Join our Discord!

    Go to https://surfshark.com/learneverything or use code LEARNEVERYTHING at checkout to get 4 extra months of Surfshark VPN!

    We also learn about: 2 truths and a lie, the jeremy kyle show, the first lie from the devil to eve (or when children first lie), the official stance of the podcast is lying is good and cool, deontic reasoning and theory of mind, flexible and explicit TOM, Ella aces the Sally-Anne test, discovering new advanced levels of lying, lying is normal for kids it’s not evil, lying is complex… but what if it wasn’t and we could just know, James Mackenzie’s original polygraph, the polygraph actually worked (just not for lying but for cardiology), sphygmomanometers, proto-feminist William Marston, back then just thinking women had a theory of mind made you a proto feminist, Tom falls down the rabbit hole of Marston’s feminism, what’s the difference between a lie you believe and the truth, Marston is the first to bring the polygraph to court in Frye vs the United States, the polygraphs turns into a one band band machine, Marston invented wonder woman and the lasso of truth, table the feminism of wonder woman another time, if corporations are people they should all go to therapy, polygraphs are still a 2 billion dollar industry, police firefighters and paramedics still take polygraphs, Caroline pre-empts the but, a polygraph is not a machine you need the interpreter, lying is useful, it’s fun to lie so who’s your favorite co-host, wow we can bond over private healthcare, dentistry asmr, tooth decay is from bacteria acid, stone age morocco acorn sweets, you can blame agriculture for cavities, fossilized plaque can give us an oral history, determining women did a job from paint in teeth, fuck I drank the paint water at least no one will know, did you say we were kissing the rats or was that my inner monologue, would you like to read the tooth worm poem? how could this possibly get to a tooth worm, most of recorded human history we believed in tooth worms, the earliest example of dentistry was a week ago, sorry it changed a week ago, an ancient beeswax filling, a 59,000 year old tooth hole, what’s a worse hyphenate than barber-surgeon, blacksmith barbers, traveling tooth pullers, so many jobs I’m glad don’t exist, a medieval dentist clown is literally someone’s worst nightmare, victorian job questionnaire, What The Eff is That, dental tools that look like weapons made in a dream, I didn’t realize until we got into this how much I hate teeth! the truth of my soul is private in Germany,

    Sources:
    The Emergence of Lying in Very Young Children
    Marjorie Rhodes NPR
    Social and Cognitive Correlates of Children's Lying Behavior
    Review of Theory of Mind in Chilren
    James Mackenzie's "The Study of the Pulse"
    Mark Harris' Great Wired Piece on Polygraphs
    Matthew Brown's Deep Dive into Marston's Feminism
    JAAPL Frye v. United States
    Cornell Law Frye Standard
    Harvard center for Law Brain and Behavior on the Polygraph
    Scientific American on Lying

    ---

    Dentistry History sources will be added soon!

    Help support this show and unlock bonus content! Become a member at https://maximumfun.org/joinlearn
  • Let's Learn Everything!

    Vote for the Best Of Everything! LetsLearnEverything.com/vote

    20/05/2026 | 2 min
    It's that time of year to vote for the Best Of Everything!

    https://www.letslearneverything.com/vote

    Help support this show and unlock bonus content! Become a member at https://maximumfun.org/joinlearn
  • Let's Learn Everything!

    105: The Marine Carnivore Question & Collecting

    07/05/2026 | 1 h 58 min
    Are there more carnivores in the ocean than land? Yes! But... why? And what does that teach us about how we study ecosystems? And what constitutes a collection? Well it goes way back in time, and can cover anything and everything interesting, and maybe even teach us about ourselves and each other.

    Images we Talk About:
    Giraffe
    Biomass Pyramid 1
    Biomass Pyramid 2
    Dolphin
    Tiger
    Purple Otter Skull

    Timestamps:

    (00:00:00) Intro

    (00:03:30) The Marine Carnivore Conundrum

    (00:56:33) Collecting

    (01:51:34) Outro

    Support us with a Max Fun Membership!

    Join our Discord!

    We also learn about: Oh yeah that topic’s gonna hit, only 5% of fish are herbivorous compared to 30% of terrestrial animals, zoopharmacognosy, carnivora is not all carnivores and not exclusively carnivores, hypercarnivores eat 70% or more meat, polar bears are some of the most carnivorous animals we know of, grizzly bears only eat 10% meat, osteophagia, suckin on bone, trophic levels, Ella’s clearly an apex predator but are all humans, trying to beat the trophic level high score, let us know your level in the discord, average trophic levels, humans are 2.2 on average, trophic jorg, lopsided biomass pyramids, there are simply less plant diversity in the oceans, land predators hunt animals with at least 45% of their body size whereas whales do .01%, oh yeah aquatic animals don’t have paws or storage, aquatic carnivores have homodont  dentition, trophic cascades, sea urchins can turn otter bones purple, hunter collector society, don’t pre-empt my question, the earliest collection we know of is from 105,000 years ago, shell collectors were just like me fr, coin collecting was a hobby of kings, a quick detour for the worst pope, but maybe Pope Boniface VIII is just like me for real, I like collecting 50 and 100 dollar bills actually, the wunderkamer or cabinets of curiosities, the industrial revolution ignited collecting, Americans turned British spoons into collecting, Ella’s love spoon, say the line Ella, this is really a “what’s wrong with Ella” topic, Edward Wharton-Tigar’s cigarette card collection and incredible quotes, David Attenburough convinced him not to take his cards with him into the 8th ring of hell, you’ve activated my trap card, magpies don’t collect shiny things and may have neophobia, animal collection, the cursed bug katamari, it’s like if I collected cards with boobs AND HE JUST LIKE ME FR, pack rat brain activation, a pack rat piss detour, amberat, collections represent our ability to abstract and think of the future, and that’s why I should get another spoon, Freud’s toilet hypothesis for collecting, Baudrillard on collecting, collecting builds yourself, They Collect What? baggers, I now collect banana friends.

    Sources:

    So, once again there are actually too many sources to fit here, it literally won't let us put them all here hahaha so please find the sources at https://www.letslearneverything.com/105-sources

    Help support this show and unlock bonus content! Become a member at https://maximumfun.org/joinlearn
  • Let's Learn Everything!

    Preview: Frogs & Improv

    30/04/2026 | 57 min
    Caroline's Frogs campaign and our improv class were some of our favorite bonus episodes we've done, so we wanted to share a sample of what they sound like!

    If your interest is piqued, you can hear the rest AND support the show at www.LetsLearnEverything.com/join

    Sources:
    JSTOR: Portmaneau Origins

    Help support this show and unlock bonus content! Become a member at https://maximumfun.org/joinlearn
  • Let's Learn Everything!

    MaxFunDrive Bonus: Tom's Casters on Casters

    27/04/2026 | 23 min
    Folks we're halfway through the MaxFunDrive! And to keep the celebration we have Tom chatting behinds the scenes with other Max Fun hosts!

    For all the details about MFD perks, the livestream, and how to support the show, go to LetsLearnEverything.com!

    Timestamps:

    (00:00:00) Intro

    (00:01:26) Casters on Casters

    Help support this show and unlock bonus content! Become a member at https://maximumfun.org/joinlearn
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Acerca de Let's Learn Everything!
Science communicators Ella Hubber, Tom Lum, and Caroline Roper learn about anything and everything interesting! Each episode they teach each other about a science topic, and learn about a miscellaneous topic. Whether it's bugs on drugs, temporal illusions, or fanfiction, there's so much out there, so let's learn everything! Join our Discord, email us, and follow us everywhere at www.LetsLearnEverything.com
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