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On this thread: Cool shit. Let's teach each stuff

First up
The Duga woodpecker over the horizon radar in chernoboyl


Teach me sum'in finalchan


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>The Little People of the Pryor Mountains[…]are a race of ferocious dwarves in the folklore of the Crow Nation, a Native American tribe.


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Our atmosphere glows in the dark



It glows in exactly the same way glowing silly putty does. Photons excite electrons in a atom, which over time become unexcited, and release the energy back as photons of a specific wavelength depending on the atom.


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The Krukenberg procedure is used when people loose hands in countries where it would be too expensive to get prothstesis. The pincers have about the same strength as your thumb. Pretty cool work around.
Many like it better because it retains the ability to touch



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>Lewis and Clark wrote about them.


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The inside of a combine harvester. So simple and so complex at the same time. Thoroughly mesmerized.


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Arguably the most metal send off you can get next to a viking funeral or a KISS casket

(NSFW images inside)


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They're not metal, if anything they're just gay.


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The last picture on that page is pretty fuckin metal


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How traffic jams occur.


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just cracked open my webm folder


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the moral here, is Fuck Deer


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This is called a yo yo despin.
Its used in rocketry to remove angular velocity (spinning) from a rocket. a weight on a cable is released, and it takes the angular momentum from the rocket.



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goddamn, that was fascinating.



Article about a short-lived pidgin language that was sort of a weird mix of Russian and Norwegian. Not entirely interesting, but mildly interesting.


linguistics is a fascinating field


Indeed it is. One thing recently that I've found super interesting is how many rules about English that native English speakers know, but can't name. This may be known amongst some of you but, I'll still share.

Firstly, adjectives in English are always in the order of opinion, size, age, shape, color, origin, material, purpose, and then the noun. An example might be, "Great big old circular golden German wooden rocking chair". However, if you move any of those words before "chair" around, the sentence sounds alien and awkward.

There's also the rule of ablaut reduplication. Do you know what it is? Probably not. However, if someone said "hop-hip" or "zag-zig", you'd know those are wrong, but you wouldn't know why. It sounds wrong because of ablaut reduplication. If you repeat a word with an altered vowel, the word with an "i" as the vowel has to go first. Zig-zag, hip-hop, chit-chat. In phrases with three words, it's got to go I-A-O.


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Snake climbing a tree. Thought it was pretty neat.


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I found this fascinating video on why the space shuttle was a failure. It was originally a much more ambitious project.
What "could have been" if we used nuclear rockets to explore space, is sad in retrospect. So much potential was lost.




Mechanical boob tube


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How the ISS was put together


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Theres a new Blue Planet coming out


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I thought the deep sea episode was kind of lackluster compared to the first one. It didn't go in depth as I thought it would.


>in depth


I felt as though their explorations probably produced lots of scientifically significant discoveries that didn't make interesting viewing. At the same time they didn't want to just re-run what they showed the first time around, so we got something in between that was mutually unsatisfying


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I hope one day I'm as good at anything as this guy is good at glass blowing.


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A guy had one of these in his tank. Its a hell of a thread.



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For the uninitiated, this thread is legendary. It's a great fuckin read.


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This is now a bobbit thread


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I hate to break it to you, but there's a guy controlling that fish. It's already dead.


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That's neat, but what is the application? Independent axles, maybe? Need more information on what it's used for.


Ive never seen this type of joint used anywhere. It seems weak, hard to lubricate, extremely hard to machine, and very prone to grit getting between the teeth.
We use Constant Velocity joints in car axles. Universal joints have effect that at an angle the output wont spin at a steady rate. CV joints use a system of ball bearings to transmit torque at an angle without changing speed


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Gears are cut in a specific pattern to reduce friction and ensure smooth engagement


you can see they only touch in one place at any one time.
The bottom gear is driving the top


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>Lets take a plane cut a hole in it and put in a telescope.

Fucking Americans man.



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What is this dark magic?


forced perspective


This is incredibly satisfying


if dubs i don't
if singles i do




i did, and it went well
i wonder if i should today
if dubs i don't
if singles i do


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My parents bought a chunk of bismuth. This shit doesnt even look real in pictures.

>The spiral, stair-stepped structure of bismuth crystals is the result of a higher growth rate around the outside edges than on the inside edges. The variations in the thickness of the oxide layer that forms on the surface of the crystal cause different wavelengths of light to interfere upon reflection, thus displaying a rainbow of colors.



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