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sciencefactss · 2 days ago
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To understand torque-induced precession, we must start by looking at the relationship between angular momentum and torque. Angular momentum is a vector quantity dependent on an object’s moment of inertia and angular velocity. Torque is also a vector quantity that represents the amount of force necessary to rotate an object along a given axis. These two quantities are directionally perpendicular to one another. The torque causes a change in direction of the angular momentum, but the magnitude remains unchanged. Thus, the bicycle wheel is able to spin gyroscopically, or precess, along its horizontal rotational axis in opposition to its vertical rotational axis.
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OFOTW #406
It has been known for a while that seagrasses create great carbon sinks that can help reduce CO₂ in water. As it turns out, it is also good at reducing a type of bacteria called vibrio, which can be very harmful to human health in great quantities. New studies show a reduced amount of bacteria in native seagrass populations.
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blackbackedjackal · a day ago
you tagged that one photo of a european red fox 'coal fox'- can i ask what that means? is it about the coloration? im curious since i own a european red fox pelt with very similar/the same coloration & am not familiar enough with european reds to know if its unusual. thank you!
Yep! It's the coloration. Coal foxes are European (I think it technically includes all Eurasian red foxes?) with dark colorations on their body. They look like they're covered in soot, hence the name. If I'm remembering right (@golden-reedwolf can correct me if my paraphrasing isn't accurate) it's a morph unique to the Euro reds as the gene is unique to those populations of red foxes. The NA reds have something similar, commonly know as bastard foxes, but it's a different gene and is usually the result of wild red foxes and silver foxes mating.
Here's an example of both morphs in my collection, a European 'coal' fox (V. v. crucigera) is on the left, and a Cascade Mountains 'bastard' red fox (V. v. cascadensis) on the right:
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theskeletongames · an hour ago
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One small fun fact. Edgy from Bitty Problems is not currently in his original bitty universe (AKA the Universe without Monsters only bitties and humans) He was brought to a rival company that was attempting to reverse engineer bitties, and the process sent him and some other bitties into a universe with fully sized monsters. 
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muppet-facts · 2 days ago
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Muppet Fact #115
Skesis have some unusual biology, including having three urethras.
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Sources:
Dark Crystal: Age of Resistance. "By Gelfling Hand..." Netflix. August 30, 2019.
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charlotte-avason · 2 days ago
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Soo fun fact about royai 👁👄👁
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That's their height difference I love it 🥲
It only 6 cm but like 😖😖
(Roy is 173 cm and riza is 167 cm)
My babies😩😩❤❤
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kingoftieland · 2 days ago
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“There was one time when we were children, he transformed himself into a snake, and he knows that I love snakes. So, I went to pick up the snake to admire it and he transformed back into himself and he was like, ‘Blaah, it's me!’ And he stabbed me. We were eight at the time…” – Thor recalling growing up with Loki in Thor: Ragnarok 🐍
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Swainson’s Hawks
Swainson’s Hawks are social raptors, nearly always being found in groups outside the breeding season. You may see them soaring in a kettle of migrating birds; strung out on the ground, fence posts, and utility poles when foraging on grasshoppers; or chasing swarms of dragonflies on winter quarters in Argentina.
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nasa · a month ago
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Discovering the Universe Through the Constellation Orion
Do you ever look up at the night sky and get lost in the stars? Maybe while you’re stargazing, you spot some of your favorite constellations. But did you know there’s more to constellations than meets the eye? They’re not just a bunch of imaginary shapes made up of stars — constellations tell us stories about the universe from our perspective on Earth.
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What is a constellation?
A constellation is a named pattern of stars that looks like a particular shape. Think of it like connecting the dots. If you join the dots — stars, in this case — and use your imagination, the picture would look like an object, animal, or person. For example, the ancient Greeks believed an arrangement of stars in the sky looked like a giant hunter with a sword attached to his belt, so they named it after a famous hunter in their mythology, Orion. It’s one of the most recognizable constellations in the night sky and can be seen around the world. The easiest way to find Orion is to go outside on a clear night and look for three bright stars close together in an almost-straight line. These three stars represent Orion's belt. Two brighter stars to the north mark his shoulders, and two more to the south represent his feet.
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Credit: NASA/STScI
Over time, cultures around the world have had different names and numbers of constellations depending on what people thought they saw. Today, there are 88 officially recognized constellations. Though these constellations are generally based on what we can see with our unaided eyes, scientists have also invented unofficial constellations for objects that can only be seen in gamma rays, the highest-energy form of light.
Perspective is everything
The stars in constellations may look close to each other from our point of view here on Earth, but in space they might be really far apart. For example, Alnitak, the star at the left side of Orion's belt, is about 800 light-years away. Alnilam, the star in the middle of the belt, is about 1,300 light-years away. And Mintaka, the star at the right side of the belt, is about 900 light-years away. Yet they all appear from Earth to have the same brightness. Space is three-dimensional, so if you were looking at the stars that make up the constellation Orion from another part of our galaxy, you might see an entirely different pattern!
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The superstars of Orion
Now that we know a little bit more about constellations, let’s talk about the supercool cosmic objects that form them – stars! Though over a dozen stars make up Orion, two take center stage. The red supergiant Betelgeuse (Orion's right shoulder) and blue supergiant Rigel (Orion's left foot) stand out as the brightest members in the constellation.
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Credit: Derrick Lim
Betelgeuse is a young star by stellar standards, about 10 million years old, compared to our nearly 5 billion-year-old Sun. The star is so huge that if it replaced the Sun at the center of our solar system, it would extend past the main asteroid belt between Mars and Jupiter! But due to its giant mass, it leads a fast and furious life.
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Betelgeuse is destined to end in a supernova blast. Scientists discovered a mysterious dimming of Betelgeuse in late 2019 caused by a traumatic outburst that some believed was a precursor to this cosmic event. Though we don’t know if this incident is directly related to an imminent supernova, there’s a tiny chance it might happen in your lifetime. But don't worry, Betelgeuse is about 550 light-years away, so this event wouldn't be dangerous to us – but it would be a spectacular sight.
Rigel is also a young star, estimated to be 8 million years old. Like Betelgeuse, Rigel is much larger and heavier than our Sun. Its surface is thousands of degrees hotter than Betelgeuse, though, making it shine blue-white rather than red. These colors are even noticeable from Earth. Although Rigel is farther from Earth than Betelgeuse (about 860 light-years away), it is intrinsically brighter than its companion, making it the brightest star in Orion and one of the brightest stars in the night sky.
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Credit: Rogelio Bernal Andreo
Buckle up for Orion’s belt
Some dots that make up constellations are actually more than one star, but from a great distance they look like a single object. Remember Mintaka, the star at the far right side of Orion's belt? It is not just a single star, but actually five stars in a complex star system.
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Credit: X-ray: NASA/CXC/GSFC/M. Corcoran et al.; Optical: Eckhard Slawik
Sword or a stellar nursery?
Below the three bright stars of Orion’s belt lies his sword, where you can find the famous Orion Nebula. The nebula is only 1,300 light-years away, making it the closest large star-forming region to Earth. Because of its brightness and prominent location just below Orion’s belt, you can actually spot the Orion Nebula from Earth! But with a pair of binoculars, you can get a much more detailed view of the stellar nursery. It’s best visible in January and looks like a fuzzy “star” in the middle of Orion’s sword.
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More to discover in constellations
In addition to newborn stars, Orion also has some other awesome cosmic objects hanging around. Scientists have discovered exoplanets, or planets outside of our solar system, orbiting stars there. One of those planets is a giant gas world three times more massive than Jupiter. It’s estimated that on average there is at least one planet for every star in our galaxy. Just think of all the worlds you may be seeing when you look up at the night sky!
It’s also possible that the Orion Nebula might be home to a black hole, making it the closest known black hole to Earth. Though we may never detect it, because no light can escape black holes, making them invisible. However, space telescopes with special instruments can help find black holes. They can observe the behavior of material and stars that are very close to black holes, helping scientists find clues that can lead them closer to discovering some of these most bizarre and fascinating objects in the cosmos.
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Next time you go stargazing, remember that there’s more to the constellations than meets the eye. Let them guide you to some of the most incredible and mysterious objects of the cosmos — young stars, brilliant nebulae, new worlds, star systems, and even galaxies!
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To keep up with the most recent stellar news, follow NASA Universe on Twitter and Facebook.
Make sure to follow us on Tumblr for your regular dose of space!
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sciencefactss · a day ago
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If you enjoyed this facts, follow my blog @sciencefactss for more interesting science facts.
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marlynnofmany · 24 days ago
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I am making a LIST of cool things that could be spell components. Ghost-glass apples definitely belong on this list.
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Screenshot of a tweet by Tyler Sebree, saying “After freezing rain in Michigan, apples that hadn’t been picked got coated in ice. Many fell off the tree. Some had their insides turn to mush as apples have lower freezing points. The mush and skin fell, leaving these ‘ghost apples.’”
This is quote-tweeted by Annie Bellet, who adds “you just know that this is a spell component.”
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mrboy425 · 2 months ago
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!! SEA SLUG APPRECIATION POST !!
( PLUS FUN FACTS !! )
because sea slugs are absolutely beautiful
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fun fact 1 - some sea slugs eat prey that is poisonous! but instead of it killing them, they store up the poison and release it against other predators
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fun fact 2 - similarly to land snails, some sea slugs can have both male and female sexual organs and can have both at the same time
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fun fact 3 - some sea slugs can be as small as sand particles or as big as 12 inches in length
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fun fact 4 - (this one is a bit more obvious but) sea slugs belong to the same class of animals as land slugs
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fun fact 5 - as pretty as they are , most sea slugs should not be handled by humans. as a lot are toxic ! do not handle a colorful sea slug unless you 100% know what you are doing!
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fun fact 6 - sea slugs do have eyes but they arent good at seeing things at all.. they mostly can only sense light and darkness
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((ooh moving onto gifs))
fun fact 7 - the slug shown above is a sea bunny !!! and its obviously named that because if how it looks like a bunny rabbit !!
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fun fact 8 - slugs are cool and really pretty !!! and you are cool too :)
FEEL FREE TO ADD MORE SLUG PHOTOS / GIFS !!!!! i think they r so neat
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muppet-facts · a day ago
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Muppet Fact #116
The Parents Television Counsel once called for a boycott of The Muppets (2015-2016) because they didn't believe it met "family viewing guidelines." Some of the reasons they cited for this boycott were: the mockumentary format, mentions of plastic surgery, alcohol consumption, and crude language.
Not only that, but One Million Moms, an offshoot of the American Family Association, also called for a boycott of the 2015 show citing it as "unsuitable for family viewing." These boycotts were called for before the show even aired.
As a result, One Million Moms and their critiques of The Muppets were parodied in the show, appearing as the One Million Angry Parents Association.
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Sources:
"New PTC Research Finds ABC's The Muppets Exposes Kids to Adult-Themed Content Every 3 Minutes." Kelley Oliver. Parents Television Council. October 20, 2015. (Archived)
"The Muppets' Slammed as 'Perverted' and 'Ruined' by One Million Moms Advocacy Group." Beatrice Verhoeven. The Wrap. September 23, 2015.
"Warning! The New 'Muppets' is Not Family-Friendly." OneMillionMoms.com. September 25, 2015. (Archived)
"US pressure group calls for 'perverted' Muppets show to be banned". ITV News. October 18, 2015.
The Muppets. Episode 12: "A Tail of Two Piggies." February 9, 2016.
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thevortexbloguk · a year ago
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Here are some interesting facts about the raven:
• They are one of the most intelligent birds on the planet - they can solve tasks, play tricks on other animals and can count
• Ravens can imitate human speech just like parrots
• They can reach 2 feet in size from head to tail - bigger than some cats
• Ravens do things just for fun, such as sliding down snowy hills, swooping when flying, and they even build their own toys out of sticks and rocks
• People who have owned ravens have said they are cat-like in nature and can be very cuddly and affectionate, but can throw a strop when they don't get their way
• Science has found that ravens can communicate by "gesturing", and point their beak in certain directions to tell other ravens where to go
• When they reach adolescence, ravens leave their parents to find other teenage ravens and join "teenage gangs"
• Ravens are monogamous and mate for life
• Although they have been seen for centuries to represent death and sadness, ravens are compassionate, loving animals and will console their raven friends if they have been injured
All in all, ravens are amazing and beautiful animals!
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Fairy Shrimp
Vernal pool fairy shrimp swim around upside down, eating algae and plankton growing in the vernal pool. In order to digest their food, they must produce a thick, glue-like substance to mix with their meal. They use their legs to filter feed or scrape food from hard substrates.
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gallusrostromegalus · a month ago
Hey gallus, whats the goofiest (non spoiler) fact about yami in your fic?
Bless you for asking questions about my fic
When Yami was Pharaoh, he had a menagerie that was both a diplomatic tool and public works project (It was a thing in a lot of the ancient world for the Ruler's menagerie to be somewhat open to the public, as a status symbol and way of keeping public opinion high), but he also had personal pets, including a pack of Hunting Dogs (and one cheetah) that acted as companions and personal body guards. Sometimes he sleeps while in control of Yugi's body, but not well, because he misses the sensation of having half a dozen greyhounds and an oversized cat sprawled on top of him.
Yugi has ADHD and the related crepuscular sleep habits, which means he often falls asleep in class after lunch, especially if the AC is out again. Yami is the ONLY reason Yugi is still passing Trigonometry.
The Millennium Puzzle is literally solar powered.
Yami is amazing at cold-reading people, keeping his cool in absolutely deranged situations and adapting to new etiquette and social rules not because he's been living an improv game since he woke up, but because, as king, he was pretty much constantly barraged with Some Fucking Guy from Who Knows Where, with a Big Fucking Problem and have to work out a diplomatic solution to this intrusion really, really fast, and he retained that skill set.
Which is to say, the actual game strategist when they are playing is Yugi. Yami is just handling the conversation and environmental effects.
His favorite 'modern' food is "berries" as most of them (strawberry, blueberry, blackberry, etc) are native to cold climates or north America so they are very new to him. Fried chicken is a very close second.
Yami is a quick study for a lot of 'modern' things like commuter trains, computers, theme parks etc because those things are actually very old or the realization of mankind's long-held dreams. But the GROCERY STORE?? That is brand-new, extremely weird and honestly a little terrifying.
Deep-seated and not totally irrational fear of hippos. Does not like that they are widely regarded as 'cute'. They are NOT CUTE, THEY WILL CHASE YOU DOWN AND BITE YOU IN HALF AND EAT BABIES AND-
Once he gets his memories back, he is responsible for a major paleontology discovery- he goes into the museum's dinosaur wing, and remembers that he too used to have a collection of the skeletons of ancient dragons, they were in one of the satellite palaces where he housed things like alchemists and astronomers to go do science where they wouldn't harm the general public. Ishizu and Rex end up on a joint archeology/paleontology exposition and discover an ancient academy of sciences and like 15 new species of dinosaur.
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worldoffactsnow · a year ago
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Architect designs childhood dream home built around a full grown tree in the middle of the forest.
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