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marten

(Encyclopedia)marten, name for carnivorous, largely arboreal mammals (genus Martes) of the weasel family, widely distributed in North America, Europe, and central Asia. Martens are larger, heavier-bodied animals th...

Brownsville

(Encyclopedia)Brownsville, city (2020 pop. 186,738), seat of Cameron co., extreme S Tex., on the Rio Grande c.17 mi (30 km) from its mouth at the Gulf of Mexico; inc....

Chrysophyta

(Encyclopedia)Chrysophyta krəsŏfˈətə [key], phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista consisting of the diatoms (class Bacillariophyceae), the golden, or golden-br...

musk

(Encyclopedia)musk, odorous substance secreted by an abdominal gland of the musk deer, used in perfume as a scent and fixative. The gland, found only in males, grows to the size of a hen's egg; the secretion is red...

planetary science

(Encyclopedia)planetary science or planetology, study of planets and planetary systems as a whole. Planetary science applies the theories and methods of traditional disciplines such as astronomy, geology, physics, ...

buffalo, in zoology

(Encyclopedia)buffalo, name commonly applied to the American bison but correctly restricted to certain related African and Asian mammals of the cattle family. The water buffalo, or Indian buffalo, Bubalus bubalis, ...

celestial mechanics

(Encyclopedia)celestial mechanics, the study of the motions of astronomical bodies as they move under the influence of their mutual gravitation. Celestial mechanics analyzes the orbital motions of planets, dwarf pl...

Tombaugh, Clyde William

(Encyclopedia)Tombaugh, Clyde William tŏmˈbô [key], 1906–97, American astronomer, b. Streator, Ill. Although lacking formal training or a college degree, he was hired in 1929 as an assistant by the Lowell Obse...

Harpers Ferry

(Encyclopedia)Harpers Ferry, town (2020 pop. 285), Jefferson co., easternmost W Va., at the confluence of the Shenandoah and Potomac rivers; inc. 1763. The town is a ...

Morton, Sarah Wentworth

(Encyclopedia)Morton, Sarah Wentworth, 1759–1846, American author, b. Boston. Under her pseudonym, Philenia, she wrote such works as Ouâbi: Or the Virtues of Nature (1790), a sentimental Native American romance....