BrainStuff

The majority of humans become lactose intolerant as they grow up. Learn how ancient herders changed our digestive gene pool in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/food-nutrition/facts/humans-built-drink-milk-adults.htm

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https://auto.howstuffworks.com/car-driving-safety/auto-safety-testing/escape-sinking-car.htm; https://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/auto-glass.htm

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Cherry blossom trees are so celebrated because their beautiful blooms are so short-lived. Learn about these trees (and how so many wound up in Washington, D.C.) in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/cultural-traditions/cherry-blossom.htm

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Starting in the 1930s, this adventurous Black woman toured the U.S., performed stunts, and served her country on motorcycles. Learn more in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-figures/bessie-stringfield.htm

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It turns out that some tree squirrels have complex organization systems for their stashes. Learn how they hide and find exactly what they want in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/squirrels-really-organize-nuts.htm

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Given the right depth, temperature, and access to volcanic gases, lakes can explode and kill thousands in the process. Learn how these limnic eruptions happen in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/geophysics/what-makes-killer-lake-explode.htm

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Palm oil is in lots of foods, cosmetics, and household products -- and that's a very serious thing. Learn the problems (and solutions) that palm oil presents in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/conservation/issues/palm-oil-is-everywhere-heres-why-that-matters.htm

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OK may be the most frequently spoken word in the world -- but what does it stand for? How did it get here? Learn the etymology behind it in this episode of BrainStuff, based on this article -- okay? Okay! https://people.howstuffworks.com/history-ok.htm

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The Ides of March is an artifact of an ancient Roman calendar that's stuck with us thanks to Julius Caesar getting himself assassinated and William Shakespeare writing about it. Learn more in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/history-vs-myth/ides-of-march.htm

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The many species of fruit bats around the world help pollinate our plants and spread their seeds far and wide. Learn more about these flying mammals in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/fruit-bats.htm

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Sometimes, foods that require more effort for our bodies to digest (like meats) can cause us to sweat. Learn why in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/diseases-conditions/digestive/are-meat-sweats-real-thing.htm

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Susan B. Anthony went from a radical arrested for placing a vote to an honoree on U.S. currency within a century. Learn more about her life and work in both abolition and women's suffrage in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-figures/susan-b-anthony.htm

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Elevators cables are inspected on the regular, but what happens when one breaks? Learn about the ingenious systems that keep elevators safe when even the worst happens in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/science-vs-myth/everyday-myths/question730.htm

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Researchers, like zombies, are interested in brains of all kinds. Learn a few basics about how donating your brain to science works in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/human-body/systems/nervous-system/5-things-didnt-know-about-donating-brain-to-science.htm

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The ocean can appear to be many different shades of blue (and green, and even violet) -- but all water is clear. Learn why in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/oceanography/why-is-ocean-different-colors-different-places.htm

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Confusion about what a Brachiosaurus is started the moment paleontologists discovered one. Learn about these long-armed sauropods (and about the dino cousin they're often pictured as, Giraffatitan) in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/dinosaurs/brachiosaurus.htm

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The term 'critical race theory' started causing a lot of buzz back in 2020, but what does it really mean? And is it being taught in schools? Learn about this academic theory in today's episode of BrainStuff, based on this article: https://people.howstuffworks.com/critical-race-theory-news.htm

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Our brains release the hormone oxytocin during pleasant circumstances and bonding experiences -- but can we really take it to induce those experiences? Learn why it's complicated in this episode of BrainStuff, based on this article: thttps://health.howstuffworks.com/human-body/systems/endocrine/oxytocin.htm

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Pistol shrimp (aka snapping shrimp) can 'shoot' bubbles that go off louder than a gun and will stun prey or dig into rock. Learn more (including how they're inspiring nuclear fission research) in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/marine-life/pistol-shrimp.htm

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As London grew throughout the 1800s, it became clear that there wasn't enough real estate for its deceased citizens. Learn how the London Necropolis Railway took the funerary show on the road in this classic episode of BrainStuff.

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Beer and soda both form sudsy bubbles when you pour them, so why does soda's foam dissipate while beer's forms a head? Learn about foam physics in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/innovation/edible-innovations/beer-form-head-not-soda.htm

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Maya Angelou was a people's poet -- an artist, activist, and teacher whose words resonate from Supreme Court Justices to internet memes. Learn more about her through a few of her own quotes in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-figures/maya-angelou-quotes.htm To hear more from today's writer, Yves Jeffcoat, listen to her podcast, On Theme: https://www.ontheme.show/ 

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Scurvy is a serious condition that's easily cured with access to vitamin C. Learn why humans get it (and why it was the scourge of the high seas) in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/diseases-conditions/rare/scurvy.htm

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Cattle burp so much methane into our atmosphere that it's the equivalent of how much cars pollute every day. Learn what researchers are trying to do about the gassy situation in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/methane-cow.htm 

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The water cycle brings Earth's water from the clouds to the ground and back again -- but how did it get here in the first place? Learn about the leading theories in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/geophysics/water-come-from.html

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These mantises look like beautiful, bright orchids -- and some use that to aggressively attract prey. Learn more in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/insects/orchid-mantis.htm

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When we lose weight, it doesn't just vanish. Learn how our bodies shrink fat cells in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/diet-fitness/weight-loss/lost-weight.htm/printable

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Some claims make it sound like probiotics are a cure-all, but what has research found so far? Learn more about these supplements for your microbiome in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/preventive-care/probiotic.htm

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As a pedestrian, crossing the street wherever you want can be dangerous -- which is why it's still technically illegal in many American jurisdictions. Learn more in this episode of BrainStuff, based on this article: https://auto.howstuffworks.com/car-driving-safety/accidents-hazardous-conditions/jaywalking-crime.htm

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Though beautiful, Bradford pear trees are invasive in the U.S., use up precious water, are brittle -- and smell decidedly funky. Learn more in this episode of BrainStuff, based on this article: https://home.howstuffworks.com/whats-that-smell-dreaded-bradford-pear.htm

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To celebrate the anniversary of poet Robert Burns' birth on January 25, 1759, Scottish people all over the world observe Burns Night each year. Learn about the verse, the bagpipes, and of course the haggis in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays-other/get-out-haggis-its-burns-night.htm

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White dwarfs have almost all the mass of a normal star squished into a ball the size of our Earth -- and that comes with a lot of gravitational power. Learn how they can tear planets to shreds in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/white-dwarfs-shred-planets.htm

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These adorable aquatic salamanders are voracious hunters -- and have myth-like powers of regeneration. Learn more about the axolotl in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/endangered-species/axolotl.htm

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Stop signs were always the red octagons we know today -- so how was the color chosen, and why has it stuck? Learn about the history and psychology of red traffic signals in this classic episode of BrainStuff.

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From the outdated Presidential Fitness Test to today's FITNESSGRAM, Americans have been giving standardized fitness tests to middle school kids for decades. Learn the past and present of these exams in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/diet-fitness/exercise/could-pass-kids-middle-school-fitness-test.htm

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Buying a cheap phone containing prepaid minutes and texts with cash can help you preserve anonymity in some ways, but companies and governments still have ways of listening in. Learn more in this episode of BrainStuff, based on this article: https://electronics.howstuffworks.com/burner-phones.htm

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In the early 1900s, psychologists went to great lengths to study their subjects without letting them know they were being watched. Learn more about their research (and about how ethical standards would prevent it from happening today) in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-events/ridiculous-history-when-scientists-hid-beds-do-research.htm

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Bacteria may be tiny, but we can harness them to create food and medicine, to detect landmines and make blood safe for transfusions. Learn what we're still learning about how bacteria shape us and our world in this episode of BrainStuff, based on these articles: https://science.howstuffworks.com/life/cellular-microscopic/bacteria-communication.htm
https://science.howstuffworks.com/life/cellular-microscopic/10-weirdest-sources-antibiotics.htm
https://science.howstuffworks.com/life/cellular-microscopic/scientists-call-for-global-germ-bank.htm
https://science.howstuffworks.com/life/cellular-microscopic/universal-blood-type.htm
https://science.howstuffworks.com/bacteria-lasers-landmine-detection.htm 

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Eco engineers are animals that vastly change the ecosystems they live in when they create their preferred habitats. Learn about a few, from hippos to tiny crabs, in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/animal-facts/5-animals-that-can-reshape-waterways.htm

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Neanderthals were more like us than we previously thought, but could they laugh? Learn why researchers think they could in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/evolution/yes-neanderthals-could-laugh.htm

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Fat provides a lot of flavor and texture in foods, so making something fat-free usually means reformulating it from the ground up. Learn more in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/food-nutrition/facts/how-do-they-get-fat-out-of-fat-free-foods.htm

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The kilogram used to be measured against an agreed-upon chunk of metal stored in France, but no longer. Learn the new measure of this standard unit of measurement in today's classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/math-concepts/kilogram-is-dead-meet-kilogram-20.htm

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The Newton Boys were a gang of brothers who made a business of robbing banks and trains in the 1920s. Learn how they largely got away with it in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/historical-figures/newton-boys-bank-robbers.htm

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 These giant trees grow trunk-like roots down from their branches and can cover the area of city blocks. Learn more about banyan trees in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/botany/understanding-roots-banyan-tree.htm

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Male seahorses are the ones that carry babies to term and give birth, but the process is fairly different from most pregnancies. Learn how it works in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/fish/male-seahorses-give-birth.htm

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When crime and other legal tangles occur on a cruise ship, what laws apply depend on where the ship is registered and where it was located at the time. Learn more in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/cruise-ship-law.htm/printable

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Marzipan is a sweet, moldable almond paste that gets worked into all kinds of holiday traditions. Learn about it (and about Glücksschwein, the good luck pig of the New Year) in this episode of BrainStuff, based on this article and podcast: https://recipes.howstuffworks.com/food-facts/marzipan.htm; https://www.iheart.com/podcast/105-savor-28019899/episode/the-marzipan-episode-is-shaping-up-90864626/

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Water usually appears clear, but ice cubes and ice on lakes often looks cloudy. Learn what has to happen for ice to freeze clear (like black ice does on roads) in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/nature/climate-weather/atmospheric/why-ice-usually-freezes-cloudy-and-not-clear.htm

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Most of the trees decorated for Christmas don't naturally grow in a perfect cone shape -- so how do they get that way, and why did we decide on that shape in the first place? Learn about the history of Christmas trees in this classic episode of BrainStuff, based on this article: https://home.howstuffworks.com/do-christmas-trees-get-shape.htm

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Although this holiday has been around for a long time, the way we celebrate in the U.S. largely developed during the 1800s. Learn about the books, celebrities, and political cartoons that made Christmas in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays-christmas/19th-century-invented-modern-christmas.htm

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The human eye is basically only limited by the curvature of the Earth and stuff that gets in its way. (Well, and various medical conditions.) Learn how far we can see in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/question198.htm

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Paris has a centralized lost-and-found station that's received everything from umbrellas to human skulls. Learn how it works in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/paris-lost-and-found.htm

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The Comstock Act was designed to criminalize anything considered indecent in the 1870s, from saucy personal letters to pamphlets about contraception. Learn how it's being revived today by anti-abortion activists in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/comstock-act.htm

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These beautiful billfish have fins almost as big as their whole bodies. Learn more about sailfish in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/marine-life/sailfish.htm

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Spoiler alert: Yes! Learn the science that makes wine and cheese go so well together in this episode of BrainStuff, based on this article: https://recipes.howstuffworks.com/happy-hour-alert-cheese-really-improves-the-taste-wine.htm

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This horned holiday demon has entered our pop culture consciousness, but where do Krampus legends come from? Learn about the history of Krampusnacht in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/cultural-traditions/where-did-krampus-come-from.htm

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We think we have a solid scientific answer to this fun puzzler. Learn about the evolution of eggs and chickens in today's episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/genetic/question85.htm

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From humble planters to ancient statuary, terracotta is a seriously useful material. Learn more about this earthenware in today's epidose of BrainStuff, based on this article: https://home.howstuffworks.com/gardening/garden-design/terracotta.htm

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The short answer here is 'very efficiently'! Though perhaps best known as the second man on the moon, Buzz Aldrin is a tireless champion of space exploration. Learn more in this episode of BrainsStuff, based on this article: https://history.howstuffworks.com/historical-figures/buzz-aldrin.htm

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These bright winter houseplants are better known for their leaves than their flowers, and they only get their color by being kept in the dark. Learn the history and science behind poinsettias in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays-christmas/poinsettia.htm

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Zionism is the nationalist movement that established Israel and continues to support Judiaism's claim to that aland. It's also one of the most controversial and complex movements of our time. Learn how it got started in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/world-history/zionism.htm

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These social, tree-dwelling monkeys are some of the smallest in the world. Learn more about them in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/marmoset.htm

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The Inca never developed a system of writing, but they kept records and told stories through intricate knotwork. Learn what researchers know -- and what they're still looking to find out -- about Inca khipu in this classic episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/cultural-traditions/unraveling-khipu-inca-knot-language.htm

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You may have heard that the tryptophan in turkey causes holiday naps, but it might not be the real culprit. Learn some turkey science in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/innovation/edible-innovations/question519.htm

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A lot of what's taught about 'the first Thanksgiving' is actually more Civil-War-era propaganda than true fact. Learn how this brief moment of peace might've gone down, plus how we got today's traditions, in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays-other/10-thanksgiving-history-myths.htm

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It's a gross but very useful fact that some insects will eat deceased humans, because scientists can observe those insects to learn about where and when a person died. Learn about forensic entomology in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/forensic-entomology.htm/printable

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This cactus is a source of food and construction material for people and animals alike, especially during the dry season in the Sonaran Desert. Learn more about it in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/botany/saguaro-cactus.htm

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When asphalt pavement cracks, a squiggle of black sealant can help prevent further damage. Learn more in this episode of BrainStuff, based on this article: https://auto.howstuffworks.com/road-tar-squiggle-drizzle.htm

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No matter what color(s) mountain ranges may be up close, when they're off in the distance, they appear blue. Learn how our eyes and the atmosphere trick us in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/mountains-appear-blue.htm

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Dog enthusiasts sometimes revel in how their pup's paws smell gloriously of corn chips, but what causes this scent? Learn the science behind Frito paws in this classic episode of BrainStuff, based on this article: https://animals.howstuffworks.com/pets/why-dog-paws-smell-fritos-corn-chips.htm

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When the temperature drops (or bounces), are you more likely to get sick? Learn the science behind the old wives’ tale in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/diseases-conditions/cold-flu/can-change-in-temperature-really-make-sick.htm

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There's actually a natural limit on how tall trees can grow -- but what about circumference? Or total mass? Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/botany/tree-grow.htm

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London Bridge crosses the Thames in a place where lots of bridges have stood -- and technically fallen -- before. Learn about the history of these bridges (and the nursery rhyme) in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/engineering/structural/london-bridge.htm

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Cone snails move slow, but catch prey fast with harpoons or clouds of paralyzing toxins. Learn more in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/marine-life/cone-snail.htm

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The Day of the Dead celebrates life by inviting the spirits of loved ones back home for feasting and fun. Learn about the history and traditions surrounding the holiday in this episode of BrainStuff, based on this article: https://people.howstuffworks.com/culture-traditions/holidays-other/day-dead.htm

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When concerns about being accidentally buried alive swept Europe and North America in the 1800s, inventors (and showmen) came up with coffins that could let a living person escape -- or at least alert someone to come dig them up. Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/science-vs-myth/afterlife/premature-burial-safety-coffins.htm

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Genetics says "probably." In this episode of BrainStuff, learn what researchers found when they submitted supposed Yeti samples for genetic testing.

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Warm foods can feel more filling than chilled foods, but why? Learn the possible explanations behind the cravings in this classic episode of BrainStuff, based on this article: https://recipes.howstuffworks.com/why-hot-food-more-satisfying-than-cold.htm

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Before DNA-based paternity tests were accurate and inexpensive, scientists (and pseudoscientists) claimed all kinds of things could work. Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/genetic/history-paternity-testing.htm

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Because of the way flights are routed, pilots are sometimes able shave a few minutes from a flight plan while in the air. Learn why just flying faster wouldn't work in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/transport/flight/modern/do-pilots-make-up-time-in-air.htm

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We all find some sounds annoying, but for people with misophonia, certain sounds trigger strong feelings of anger and anxiety. Learn what researchers think causes this in today's episode of BrainStuff, based on this article: https://science.howstuffworks.com/life/inside-the-mind/human-brain/why-do-some-people-hate-the-sound-chewing-scientists-might-have-the-answer.htm

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The Chernobyl nuclear accident caused a lava-like flow of radioactive fuel and other materials that hardened into a giant mass now known as the Elephant's Foot. Learn how corium like this forms in today's episode of BrainStuff, based on this article: https://science.howstuffworks.com/chernobyl-elephants-foot.htm

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These toothy fish are some of the largest in North America. Learn how they've lasted 100 million years in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/fish/alligator-gar-100-million-years-old-and-still-kicking.htm

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Home burials are largely a thing of the past, but they're perfectly legal in most states -- once you check a few boxes. Learn how home burials work in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/science-vs-myth/afterlife/can-you-bury-someone-your-backyard.htm

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If you've ever noticed that airplane food is a little lackluster, the recipe isn't necessarily to blame. Learn how a plane's altitude and even engine noise can affect flavors in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/transport/flight/modern/mile-bleh-club-why-airline-food-doesnt-taste-good.htm

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We have one particular guy to thank for the distinctive orange-yellow color of U.S. school buses. Learn how Frank Cyr helped revamp student transportation in the 1930s in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/why-are-school-buses-yellow.htm

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Megamasers are astronomical phenomena that may mean galaxies have collided in the distant reaches of the universe. Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/megamaser-news.htm

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Although hanging upside down for too long would eventually kill you, don't worry -- brief inversions (and even longer inversions) are fine. Learn why, plus how inversions can actually be good for you, in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/innovation/science-questions/hang-upside-down-how-long-safe-deadly.htm

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Alexander von Humboldt was a scientist with the means and fame to change how Europe thought about nature. Learn why he's sometimes called the first ecologist in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/oceanography/alexander-von-humboldt-and-humboldt-current.htm

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These stinging sea creatures aren't jellyfish -- they're actually colonies of individual creatures working as one. Learn more about men-of-war and other siphonophores in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/marine-life/portuguese-man-of-war.htm

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That sweet-milky-musky scent that newborn babies have is a combination of hundreds of compounds. Learn more in this episode of BrainStuff, based on this article: https://lifestyle.howstuffworks.com/family/parenting/parenting-tips/recreate-new-baby-scent.htm

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Over 2000 years ago, Babylon was the largest, wealthiest city in the world -- but it didn't last. Learn about its past, present, and myths in this episode of BrainStuff, based on this article: https://history.howstuffworks.com/history-vs-myth/babylon.htm

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Which way should the plates face? What about the silverware -- handles up or down? Do you need to pre-rinse? Learn how to make your dishwashing machine work its best in this classic episode of BrainStuff, based on this article: https://home.howstuffworks.com/best-way-to-load-dishwasher.htm

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Conventional wisdom says that eating carrots will give you better vision, but how true is that? Learn where the idea came from in this classic episode of BrainStuff.

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It's best to give deceased beached whales a respectful amount of space because they can explode. Learn how it works in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/mammals/beached-whales-explode.htm

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The nursery rhyme about Humpty Dumpty (and his wall, and his fall) is omnipresent. But who (or what) was this guy, really? Learn about the weird history of this verse in today's episode of BrainStuff, based on this article: https://entertainment.howstuffworks.com/arts/literature/humpty-dumpty.htm

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These birds of prey are one of the fastest animals in the world -- engineers study them to make airplanes more aerodynamic. Learn more in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/birds/peregrine-falcons-are-one-fastest-animals-alive.htm

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Do you knock on wood or avoid particular numbers? People around the world adhere to superstitions to attempt to change their luck -- and some of those superstitions are remarkably similar. Learn more in this classic episode of BrainStuff, based on this article: https://people.howstuffworks.com/superstitions-universal-across-cultures.htm

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Dogs’ noses are often wet, but why? And does a dry nose mean your pup is sick? Learn what science has to say about dogs’ noses in this classic episode of BrainStuff, based on this article: https://animals.howstuffworks.com/pets/why-do-dogs-have-wet-noses.htm

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