Marcin Wichary wonderfully writes about discovering an obscure technique for sharpening and de-moiréing old images using FFT or Fast Fourier Transform.
I also loved this bit:
I’ve always had this theory that any long-term project requires two ingredients: things you’re good at, and things you want to learn. The first group gives you a feeling of accomplishment and mastery. The other one? It keeps things interesting.
via Pixel Envy
There can be too much light.
Today I learned: a Kugelblitz is the (theoretical) phenomenon where the concentration of light (or heat, or radiation) is so intense that it warps spacetime enough to spawn a black hole.
Further down the same Wikipedia rabbit hole I learned of the concept of black hole starships — using black holes as an energy source for interstellar travel.
I often get goosebumps from music, most of the times it's songs that build up to "really big", Minnie Ripertons "Les Fleurs" is one that immediately comes to mind. Well, now I know why that happens—I get scared.
According to Huron, researchers have discovered that several of the frisson’s acoustic correlates—things that seem to induce the sensation in listeners—are fear-related. These correlates include rapidly large increases in the loudness of music, abrupt changes in tempo and rhythm, a broadening of frequencies and an increase in the number of sound sources, among other factors.