Blue lava erupting from the Kawah Ijen volcano in Indonesia. The mountain contains large amounts of pure sulfur, which emit icy violet colors as it burns. | by Olivier Grunewald [2048 × 1362]
The mineral component of bone is comprised mostly of the calcium phosphate mineral hydroxyapatite which is embedded in the organic component type I collagen. When bone is exposed to a mildly acid environment the mineral component leaches out leaving only the pliable organic component. Vinegar is safe to use and does not destroy the protein scaffolding that gives bone it’s characteristic shape. This is a human fibula tied in a knot.
Listen to the sound of wikipedia
This is a way to listen to changes to wikipedia. You are literally listening to knowledge being added to the world.
Pluck sounds are an addition, strings are subtractions, and the pitch says how how big the edit is. My heart shudders at this I love it so much.
The curvature of curves.
x²
x³
sin(x)
exp(x)
Normal distribution (y=exp(-x²/2))
Ellipse
r=5/2+cos(3τθ)
x=(t-1)(t+1), y=t(t-1)(t+1)
Archimedes’ Spiral
Logarithmic spiral
If you want to try your own curve, try on Desmos graphing calculator!
https://www.desmos.com/calculator/lpm3igzbhy
NASA created retro travel posters for different locations in our solar system in hopes of inspiring young people to imagine a future where common space travel is a possibility.
Source
Y’ever read something and have understanding that has eluded you interminably suddenly stop, curl up, and snuggle neatly into a fold in your brain because a new way way opened to it?