A 130×130-square solution to the Knight’s Tour problem.
Via Wikipedia user Niels Noordhoek
An acoustical device used before the invention of radar to detect incoming planes by sound. The stereo horns ran right into the operators ears, like gigantic headphones. To the right is a spotlight for nighttime operation.
OLED panels (via Wikipedia user STRONGlk7)
While searching Wikipedia for a previous post, I learned that some articles are “orphaned” – they have no other articles that link to them. The entire list of 118,308 articles is listed here; the first few listings for “Aa” are:
Images of rope making machines, which twist individual strands separately (driven by a single crank), which are then combined into one thicker rope.
Also highly recommended are these videos on the Wikipedia page for Rope, which I sadly cannot seem to convert from OGV to anything usable :(
Just the sharp flash spots on a photograph of jambalaya from Wikipedia.