Rifles like the AK-47 have curved magazines because their bullet cases are conical (a.k.a "tapered") rather than cylindrical. Thus, they stack in a curve. Tapered cases have less friction with the chamber when they feed or extract. en.wikipedia.org/wiki/7.6…
Kurt Cobain had scoliosis (curved spine) since high school. He had minor scoliosis in HS but due to the weight of his guitar, it aggrevated his spine to curve more which you leave him a lot of pain. rockymountainbrainandspin…
A dog’s age is not 7 times human age, but: 16(ln(dog’s age))+31. It’s a natural logarithmic curve, so a 1-year old dog is about 31 in human years, and a 10-year old is about 68. (Link has calculator!) smithsonianmag.com/smart-…
Danica McKellar, the actress who played Winnie Cooper on the Wonder Years, went on to write six books on mathematics, including "Hot X: Algebra Exposed," "Kiss My Math," and "Girls Get Curves: Geometry Takes Shape." en.wikipedia.org/wiki/Dan…
Swelling around nail beds or nails that curve downwards can be a telltale sign of lung cancer and it is advised to consult a doctor asap. huffingtonpost.co.uk/entr…
The Laffer curve, a theoretical relationship between rates of taxation and resulting revenue. It assumes that no tax revenue is raised at the extreme tax rates of 0% and 100%, and that there is a tax rate that maximizes government tax revenue. The shape of the curve is disputed among economists. en.wikipedia.org/wiki/Laf…
Today I learned about an engineering principle called the "Bathtub Curve". It suggests all products have 3 phases of reliability: An early high failure rate that decreases as defects are removed, a period showing intrinsic (random) failure rate, and then an increase in failures as wearout occurs. sciencedirect.com/topics/…
- The reason why the very long and straight roads in the U.S have random curves/ zigzags is to correct itself against the curvature of the earth. kottke.org/18/01/us-road-…
Today I learned of The Crooked Forest of Poland, or Krzywy Las where about 400 pine trees grow crooked with a sharp 90 degree bend at their bases and oddly all point in the same direction-North. They grow to be about 50 feet tall and are generally healthy despite the unnatural curves at their bases. nytimes.com/2017/03/31/sc…
The Keeling Curve, used to measure carbon dioxide in the air, has been increasing steadily from values around 317 parts per million (ppm) when Charles D. Keeling began measurements in 1958, to nearly 400 ppm today. youtu.be/dXBzFNEwoj8
Laerdal Tunnel in Norway at 24.51km/15.2 mi is the longest road tunnel in the world. For safety, to reduce monotony, it has slight curves added between straight stretches of road. And caverns every 6 km that are lit with blue, yellow and golden lights. They can be used for stops/rest breaks. amusingplanet.com/2015/03…
The world's longest sea bridge is 55km between Hong Kong and Macau but it is only open to drivers with a special permit. Towers above the bridge are designed to look like dolphins and curves of the road are meant to resemble a snake theguardian.com/world/201…
A "steep learning curve" commonly used to refer to something difficult to learn, should actually mean rapid progress in learning. The X-axis can be experience and Y-axis can be learning, so the steeper it is, the more quickly it is ascended. en.wikipedia.org/wiki/Lea…
"a steep learning curve" means the opposite of what most people think it means. malaher.org/2007/03/pet-p…
Today I learned about Bob Knodel, a prominent flat-Earther who accidentally demonstrated the rotation of the Earth (excerpts from the documentary Behind the Curve) youtube.com/watch?v=J9p2Y…
Bananas get their curve because they grow towards the Sun. dole.eu/dole-earth/farmto…
A curve ball can curve 17.5 inches from mound to plate. popsci.com/how-people-pro…
In 1993, 16-year-old Keron Thomas posed as a train conductor and drove an A train for three hours and safely delivered passengers to their destinations before he accidentally triggered an emergency brake on a fast curve. nydailynews.com/new-york/…
According to β€œSolomon Cuve”(also called the β€œCrash Risk Curve”) drivers traveling 5 mph (8 km/h) above the average speed of traffic are statistically the least likely to be involved in a crash while crash risk increases dramatically when traveling below the average speed. en.wikipedia.org/wiki/Sol…
Mesopotamia mathematicians (modern Iraq) had a method for estimating the area under a curve by drawing a trapezoid underneath, a technique previously believed to have originated in 14th century Europe. This method allowed them to find the distance Jupiter had traveled in a certain amount of time smithsonianmag.com/scienc…
A Lesbian Rule is a flexible ruler made from lead used to reproduce irregular curves in construction en.wikipedia.org/wiki/Les…
Babirusa, a species of wild pigs whose tusks grow so large that they can actually curve into it’s own skull killing the beast by piercing its brain. sheddingoftheego.com/2017…
Students at The Johns Hopkins University collaboratively decided to opt out of their final since the professor set his curve based on the highest score grading it as 100%. They chose to receive a score of zero making it the highest grade, thereby getting 100% insidehighered.com/news/2…
In medieval castles, stairwells ran clockwise, so attackers coming up the stairs had their sword hands (right hand) against the wall's interior curve which made it hard for them to swing their swords. Defenders had their swords on the outside wall, which meant more room to swing. medieval.stormthecastle.c…
Early roller coasters often required brakemen to stop them from flying off hills or curves. en.wikipedia.org/wiki/Sid…
Students from Johns Hopkins took advantage of their professor's test curve by unanimously boycotting the final. They all received 100s. insidehighered.com/news/2…
Men and women have about the same level of intelligence, but a different distribution. Men have a higher standard deviation, so are spread out on the bell curve. This could possibly explain men's higher representation in science, leadership, and prestigious roles. iqcomparisonsite.com/sexd…
The international date line isn't straight. It actually curves around Alaska to keep all of Alaska as having the same date. It also keeps Russia and Alaska as having different dates. wikipedia.org/wiki/Intern…
Astronauts are not actually floating. They are falling, but around the Earth instead of towards it. This is because any object orbiting Earth is traveling at a speed of at least 28,160 km/h. As they accelerate towards it, the Earth curves away beneath them and they never get any closer. universetoday.com/95308/w…
The "Brachistochone" is the curve that describes the fastest way for a marble to descend to another point not directly under it (vsauce video exists). Because gravity speeds up the ball as it descends more quickly, a straight line is actually very unoptimal. en.wikipedia.org/wiki/Bra…
Johann Bernoulli published the problem of the Brachistochrone Curve, but no one has solved it for 6 months. When Isaac Netwon took the challenge, he solved it in one night and mailed the solution anonymously. Bernoulli recognized its author and said he recognizes a lion from his claw mark. en.wikipedia.org/wiki/Bra…
In 1993, a researcher "discovered" and actually published their method on finding the area under a curve... essentially forgetting that calculus existed for 400 years already. care.diabetesjournals.org…
Alcohol consumption tends to follow a log normal curve. In America, the top 10% of drinkers consume ~5x more alcohol than the next highest drinkers. slate.com/articles/health…
Modern capital letters are characterized by straight lines and supple curves to make them easier to carve into stone. Lower case letters were only used for everyday writing and weren't originally used in conjunction with upper case. en.wikipedia.org/wiki/Rom…
The "s" curve in drain pipes acts as a water lock to prevent sewer gas from escaping into buildings en.wikipedia.org/wiki/Tra…
While only 10% of the entire world's population is left handed, they are at the top of the survival of the fittest- in combat or battle, using a left hand is a curve ball and surprise which wins. huffingtonpost.com/2012/1…
Today I learned of the Blancmange Curve: a curve that is continuous everywhere yet differentiable nowhere. en.wikipedia.org/wiki/Bla…
Stairwells in medieval castles curved very narrowly and clockwise. Attackers coming up the stairs had sword hands (right hand) against the interior curve of the wall and made it very difficult to swing their swords. Defenders had their sword hands on the outside wall giving much room to swing. medievalcastles.stormthec…
Scientists are building a telescope with mirrors that are 8.4 meters across but less than 25 nanometers of deviation from a perfect parabolic curve scientificamerican.com/ar…
A Flettner Airplane flies without wings: instead, it has cylinders that spin which, using the same physics as throwing a curveball, "curves" the vehicle upwards into the air! en.wikipedia.org/wiki/Fle…
Because learning curves are a graph of learning over time, a "steep learning curve" actually means that there is a lot of learning over a short period of time, and doesn't necessarily relate to the difficulty of the subject matter. en.wikipedia.org/wiki/Lea…
The reason traditional Asian roofs curve out at the corners is to allow more light to enter the windows in winter and give more shade in summer. ancient.eu/Korean_Archite…
A "steep learning curve" does not mean an activity is difficult to learn. It means the opposite: rapid progress is made over time. en.wikipedia.org/wiki/Lea…
When standing on the beach and looking out at the horizon you are only able to see approximately 3 miles of ocean due to the curve of the Earth. science.howstuffworks.com…
The Earth curves at the rate of approximately 8 inches per mile (or 12.6 cm per km). davidsenesac.com/Informat…
If you cross the border from Afghanistan to China, you have to set your watch forward 3.5 hours. There's even a place where the border curves in such a way that you'd be traveling WEST while jumping three and a half time zones forward. howderfamily.com/blog/gre…
The aliens in Space Invaders were supposed to stay the same speed, but as the number of enemies fell it became easier to render, increasing the speed and adding a difficulty curve. gamefaqs.com/top10/2563-t…
Thermostats sense the temperature with a strip of two different metals fastened together. Because the metals expand at different rates, it causes the strip to curve, breaking or completing the circuit at different temperatures. explainthatstuff.com/ther…
Danica McKellar, who played Winnie on The Wonder Years, quit acting to become a mathematician - writing books such as Algebra Exposed and Girls Get Curves danicamckellar.com/
Idiocracy's premise that IQ is declining because lower IQ people are having more kids was the basis for numerous policy recommendations in The Bell Curve (1994) to prevent IQ from declining en.wikipedia.org/wiki/The…

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