Bayldonite is a relatively rare green secondary arsenate mineral. It has the chemical composition PbCu3(AsO4)2(OH)2 and occurs in oxidised zones of copper- and lead-bearing deposits. It occurs in various shades of green, and has an apple-green streak.
Image 1: Bayldonite pseudomorph after mimetite from Tsumeb, Namibia. (c) Rob Lavinsky and irocks.com
Image 2: Acicular bayldonite in bayldonite vug from Tsumeb, Namibia. (c) Rob Lavinsky and irocks.com
9:36 pm • 8 March 2014 • 343 notes
My advisor is a primatologist and sometimes we get items like this sent to our lab. These beauties were collected at customs.
11:07 am • 8 March 2014 • 138 notes
Title: Rolling cube
Material: Animation / gif / blender
11:02 am • 8 March 2014 • 130 notes
Twenty years ago, 11,000 people planted 11,000 trees on an artificial mountain near Ylöjärvi, Finland. The trees were planted in a mathematical pattern based on the golden section; in time they will grow into a virgin forest each tree of which has a designated custodian. The trees can change ownership, but they can never be removed from the forest, and the mountain itself can never be owned or sold.
Artist Agnes Denes conceived the project in 1982, and the Finnish government undertook it 10 years later. The site is legally protected for the next 400 years.
2:20 pm • 7 March 2014 • 1,672 notes
What Tree Rings Sound Like Played on a Record Player
Description from LiveScience:
Artist Bartholomäus Traubeck has custom-built a record player that is able to “play” cross-sectional slices of tree trunks. The result is his artpiece “Years,” an audio recording of tree rings being read by a computer and turned into music, much like a record player’s needle reads the grooves on an LP.
The tree rings are actually being translated into the language of music, rather than sounding musical in and of themselves. According to Makezine, the custom record player takes in data using a PlayStation Eye Camera and a stepper motor attached to its control arm, and relays the data to a computer. A program called Ableton Live then uses it to generate an eerie piano track.
Though the record player “interprets” rather than actually “playing” the tree trunk, as Gizmodo notes, the song still varies with each new piece of wood placed on the turntable.
9:16 pm • 4 March 2014 • 1 note