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I first came on here to edit on April 28, 2004 (19 years ago now!) It is an addicting idea to try to add to something much bigger than I could ever do. I am a little skeptical over the idea of freedom to change anything, but overall I'm very impressed by the quality of articles and I have faith good work is being done and I can add to it.
There are many quality websites out there and it seems silly to duplicate too much. I like the idea of learning about something and testing my knowledge by trying to share it. For me that motivates much of my efforts here.
My specialty has primarily been image generation, perhaps because I've found so many articles where useful images were absent. I try to make quality images, but I will compromise perfection for meaningful improvement. I'm happy if anyone can replace my images with better ones.
[3] Jimmy Wales is founder of Wikipedia, the self-organizing, self-correcting, ever-expanding, and thoroughly addictive encyclopedia of the future. In this presentation, he explains how Wikipedia's collaborative system works, and why it succeeds. (Recorded July 2005 in Oxford, UK. Duration: 20:47)
Pyromorphite is a mineral species composed of lead chlorophosphate: Pb5(PO4)3Cl, sometimes occurring in sufficient abundance to be mined as an ore of lead. First distinguished chemically by Martin Heinrich Klaproth in 1784, it was named pyromorphite by Johann Friedrich Ludwig Hausmann in 1813. It is usually green, yellow or brown in color, with a resinous lustre. Crystals are common and have the form of a hexagonal prism terminated by the basal planes, sometimes combined with narrow faces of a hexagonal pyramid. Other forms include crystals with a barrel-like curvature and globular or reniform masses. Pyromorphite is part of the apatite group of minerals and bears a close resemblance physically and chemically with two other minerals, mimetite and vanadinite. This focus-stacked photograph, merged from 26 separate images, shows a sample of pyromorphite extracted from the Resuperferolitica Mine in Santa Eufemia, in the Spanish province of Córdoba. The sample measures 3.5 cm × 3.0 cm × 1.5 cm (1.38 in × 1.18 in × 0.59 in).Photograph credit: David Ifar