Ultra-pure silver crystal (more than 99.95%); via Wikipedia user Alchemist-hp.
Wikipedia Visualization (eary version)
An early version of an interactive visualization of links in Wikipedia.
“Bit Slip”
Bit slip is (sometimes) caused “if a hard drive encounters a long string of 0s, without any 1s (or a string of 1s without 0s), it may lose track of the frame between fields, and suffer bit slip. Thus one prevents long strings without change via such devices as run length limited codes.”
Via: Wikipedia
Tree Map
Tree Map via Wikipedia user Carnivore1973
Tiered Loops
Qibba in Thaghirt Oasis
Qibba in Thaghirt Oasis; Béchar, Algeria (photo via Wikipedia user Marina Calvo)
Crossed Writing
“Crossed” writing, or two pages written on the same side at 90º angles to each other. The above letter is from 1837
Via: Wikipedia
Patterned Breads
Photograph of sesame flatbreads in X’ian, China by Dana Fritz
A selection of Tajik non by Wikipedia user Zlerman
Icelandic laufabraud, with intricate patterns
Chairlift Mechanism
Chairlift mechanism, via Wikipedia user Roberto Ferrari
Longitudinal Acoustic Phonons In 1D Lattice
Via: Wikipedia user Greg L