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Today's featured article

George Floyd Jr. (born 1960) is an American former professional football player who was a defensive back for two seasons with the New York Jets in the National Football League. Floyd played college football for the Eastern Kentucky University Colonels, where he won the 1979 National Collegiate Athletic Association Division I-AA football championship and set several school records, including for the most career interceptions (22), and the most career interception return yards (328). Floyd appeared in ten games during the 1982 New York Jets season, including three playoff games. He missed the entire 1983 season and appeared in eight games during the 1984 season before retiring after his third knee injury. He was inducted into the College Football Hall of Fame in 1999. After the murder of George Floyd, an unrelated black American man, in May 2020, his photograph was erroneously included in a montage at the funeral. As of 2023, Floyd is a defensive backs coach for Conner High School in Kentucky. (Full article...)

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{{TSF Saturday}} Pyromorphite

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

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