Author name: pinc

Somasteroidea

Somasteroidea is the name given to a group of extinct star‑shaped marine animals classified within the phylum Echinodermata and more specifically associated with the subphylum Asterozoa. These ancient organisms lived during the Paleozoic Era, appearing in the Early Ordovician Period (approximately 510–493 million years ago) and becoming extinct by the Late Devonian. Somasteroids are best known from […]

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Reaction rate

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time.

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Jerry Seinfeld

Jerome Allen Seinfeld (born April 29, 1954) is an American stand-up comedian, actor, writer, and producer. He is best known for playing a semi-fictionalized version of himself in the sitcom Seinfeld, which he created and wrote with Larry David. The show aired on NBC from 1989 until 1998, becoming one of the most acclaimed and

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University of Sheffield

The University of Sheffield is a public research university in Sheffield, South Yorkshire, England. Its history traces back to the foundation of Sheffield Medical School in 1828, Firth College in 1879 and Sheffield Technical School in 1884. University College of Sheffield was subsequently formed by the amalgamation of the three institutions in 1897 and was

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Mappa mundi

A mappa mundi is any medieval European map of the world. Such maps range in size and complexity from simple schematic maps 25 millimetres (1 inch) or less across to elaborate wall maps, the largest of which to survive to modern times, the Ebstorf map, was around 3.5 m (11 ft 6 in) in diameter.

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