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ELI5 Fire Extinguishers - why are they red in color?
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ELI5 HRV - what is heart rate variability and why can a steady heartbeat be trouble?
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ELI5 Palladium - more valuable than gold?
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ELI5 Jevons Paradox – why adding more lanes to a highway can make it worse?
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ELI5 Titanium - why is it the metal most used in surgeries?
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ELI5 Xmas - how and why NORAD tracks Santa (part 2)?
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ELI5 Xmas - why some say Happy Christmas vs Merry Christmas?
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ELI5 Pearls - how does a grain of sand make such treasure?
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ELI5 National Debt - who do countries owe when they are in debt?
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ELI5 Bubble Gum - why is it almost always pink?
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ELI5 Morse Code - what tragedy led to its invention?
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ELI5 Marble - why does it feel cool to the touch?
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ELI5 Aircraft Carriers - why are the runways at an angle?
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ELI5 Iron - is body iron different to construction iron?
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ELI5 Daylight Savings Time - who thought it was a good idea?
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ELI5 Submarines - how the Titanic was a cover for a US Navy submarine mission
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ELI5 The Gold Standard - how Isaac Newton helped gold win over silver
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ELI5 Locks and Keys - aren't there high chances that two keys are the same?
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ELI5 Monopoly - was it invented to criticize capitalism or crush friendships?
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ELI5 Ferris Wheels - what inspired George Ferris to invent it?
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ELI5 Silica Gel Desiccants - can they be reused?
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ELI5 Sleepwalking - is it dangerous to wake someone in the middle of a sleep walk?
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ELI5 Poker - which US president used poker to launch his election campaign?
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ELI5 Washing Machines - more consequential than the internet?
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ELI5 LiDAR - how it sees the world?
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ELI5 Deck of Cards - why 52 playing cards and why so mysterious?
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ELI5 Gout - what is it and why is the big toe a target?
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ELI5 Rubiks Cubes - how do some people solve it in seconds?
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ELI5 Toilets - why are public toilets tankless unlike those at home?
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ELI5 Black Box Flight Recorders - what’s inside the orange mystery?
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ELI5 Wine - which came first, wine or beer?
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ELI5 Beer - why it was central to historical society?
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ELI5 Creatine - what makes it so popular and does it really make you stronger?
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ELI5 Induction Stoves - are they really faster than gas stoves?
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ELI5 Muscle Knots - do muscles really get in knots and what causes them?
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ELI5 Berries - is the banana really a berry?!
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ELI5 Paper Sizes - why paper sizes in the US are different?
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ELI5 Defibrillators - why AEDs at malls differ from those on TV?
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ELI5 Dragons - why do dragons exist across almost every culture?
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ELI5 Invisalign – are they better than braces?
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ELI5 Stoicism - what are the four Stoic values?
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ELI5 Panama Canal - why did the original French attempt fail?
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ELI5 Blood Types - do animals have different blood types just like humans?
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ELI5 Fish Oil - if it’s so good for you, why not use it more for cooking?
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ELI5 Traffic Lights - why not use pressure sensors?
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ELI5 GPUs - why are they better than CPUs for artificial intelligence?
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ELI5 Sunrise - why do sunrise and sunset look different?
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ELI5 Sliced Bread - why is it the greatest thing since…
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ELI5 Nautical Miles - why are they different from the regular mile?
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ELI5 AA Batteries - how did AA type batteries become standard and what about the A battery?
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ELI5 Meditation - Can meditation really change your brain?
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ELI5 Wolves - why are there big cats but not big dogs in the wild?
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ELI5 E. Coli - what is it and why isn’t it all bad?
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ELI5 Schrödinger's Cat - is the cat both dead and alive and why does it matter in quantum mechanics?
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ELI5 Rare Earth Metals - why they aren’t actually rare?
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ELI5 LASIK - how exactly does it fix your vision?
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ELI5 Ligers, Lions and Tigers - who would win in a fight?
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ELI5 Wasabi - is most wasabi really “fake” outside of Japan?
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ELI5 Spicy Food - if water is not a good antidote, what is?
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ELI5 Rubber Bands - why do they become brittle over time?
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ELI5 Mint - why it became associated with freshness?
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ELI5 Black Friday - why is it called Black Friday?
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ELI5 Myopia - why can’t you buy myopia glasses off the shelf like reading glasses?
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ELI5 Volcanoes - can they be used for dumping trash?
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ELI5 Lab Grown Diamonds - why do they have lower resale values?
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ELI5 MRIs - how do they work and why are they so noisy?
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ELI5 Aircraft Engines - why propellers on military planes vs jet engines?
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ELI5 Speed of Light - why can’t we exceed it?
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ELI5 QR Codes - how do they work even with portions covered or obscured?
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ELI5 Dyson Sphere - did aliens already build one?
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ELI5 Skyscrapers - which NYC skyscraper could have fallen over?
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ELI5 Super Mario Bros - how did it fit into 32KB?
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ELI5 Lie Detector Tests - how do polygraph tests work?
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ELI5 Solar Eclipses - how often do they occur?
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ELI5 Donor Organs - do donor organs age according to the donor’s age or the new host’s age?
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ELI5 Prime Numbers - why isn’t 1 a prime number?
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ELI5 Burping - how loud was the world loudest burp?
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ELI5 Yawning - why is it contagious?
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ELI5 Olympics - why the amateur vs professional line blurred?
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ELI5 USB - is it still wrong to remove a thumb drive without first ‘ejecting’?’
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ELI5 Sore Throat - is alcohol or honey a better remedy?
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ELI5 Dyson Sphere - what exactly is it?
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ELI5 Collagen - what makes it special and important for your skin?
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ELI5 Mona Lisa - why is it the most famous painting in the world?
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ELI5 Blueberries - what makes them a superfood?
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ELI5 Three Body Problem - what makes it so intriguing?
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ELI5 Two Factor Authentication - how are authenticator apps more secure than SMS?
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ELI5 Starlink - what makes it possible and how does it work?
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ELI5 Bubble Tea - how did it become a global sensation?
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ELI5 Higgs Boson - how it was named the God Particle?
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ELI5 Life Insurance - why the astronauts of Apollo 11 couldn’t buy life insurance?
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ELI5 El Niño and La Niña - what exactly are they?
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ELI5 Horse Racing - what’s the role of the jockey?
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ELI5 Alpha Bravo Charlie Delta - the NATO Phonetic Alphabet
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ELI5 Airport Runways - how are they numbered?
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ELI5 Gore-Tex - what makes Gore-Tex so special?
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ELI5 Train Tracks - how do trains maintain traction in slippery conditions?
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ELI5 Bailouts - why don't governments own the companies they bail out?
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ELI5 Jet Stream - can a regular plane break the sound barrier on a jet stream?
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ELI5 Matcha Tea - how do you tell if it’s high quality?
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