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otter
Any of several carnivore species in four genera of semiaquatic, web-footed members of the weasel family (Mustelidae), found throughout Africa, N. and S. America, Europe, and Asia. Otters have the same general proportions as weasels. Size varies among species; total length is typically 3-7 ft (1-2 m) and weight is 6.5-60 lbs (3-27 kg); the large sea otter is an exception. Otter fur, especially that of N animals, is highly valued. Most species live near rivers; some live near lakes or streams; the sea otter is completely marine. Otters eat small aquatic animals. They are inquisitive and playful; a favorite sport is sliding down a mudbank and plunging into water.


Pater
English critic, essayist, and humanist. Elected a fellow at Oxford in 1864, Pater made his reputation as a scholar and aesthete with essays collected in Studies in the History of the Renaissance (1873). Written in a delicate, fastidious style, the essays introduced his influential advocacy of "art for art's sake," which contrasted with the prevailing emphasis on art's moral or educational values and became a cardinal doctrine of Aestheticism. Marius the Epicurean (1885), a philosophical romance on the ideal life, is his most substantial work.


water
Inorganic compound composed of hydrogen and oxygen (H2O), existing in liquid, gas (steam, water vapor), and solid (ice) states. At room temperature, water is a colorless, odorless, tasteless liquid. One of the most abundant compounds, water covers about 75% of the earth's surface. Life depends on water for virtually every process, its ability to dissolve many other substances being perhaps its most essential quality. Life is believed to have originated in the world's oceans, and living organisms use aqueous solutions (incl. blood and digestive juices) as mediums for carrying out biological processes. Because water molecules are asymmetric and therefore electric dipoles, hydrogen bonding between molecules in liquid water and in ice is important in holding them together. Many of water's complex physical and chemical properties (high melting and boiling points, viscosity, surface tension, greater density in liquid than in solid form) arise from this extensive hydgrogen bonding. Water undergoes dissociation to the ions H1 (or H3O+) and OH-, particularly in the presence of salts and other solutes; it may act as an acid or as a base. Water occurs bound (water of hydration) in many salts and minerals. It has myriad industrial uses, incl. as a suspending agent (papermaking, coal slurrying), solvent, diluting agent, coolant, and source of hydrogen; it is used in filtration, washing, steam generation, hydration of lime and cement, textile processing, sulfur mining, hydrolysis, hydraulic systems, as well as in beverages and foods. See also hard water, heavy water.


Baer
Prussian-Estonian embryologist. Studying chick development with his friend Christian Pander ...

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