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mole, in zoology

(Encyclopedia)mole, in zoology, common name for the small, burrowing, insectivorous mammals of the family Talpidae, found throughout the temperate Northern Hemisphere. Moles are trapped as pests, although they prob...

amyotrophic lateral sclerosis

(Encyclopedia)amyotrophic lateral sclerosis (ALS) āˌmīətrōfˈik, sklĭrōˈsĭs [key] or motor neuron disease, sometimes called Lou Gehrig's disease, degenerative disease that affects motor neurons in the brai...

Powell, Colin Luther

(Encyclopedia)Powell, Colin Luther, 1937–2021, U.S. army general and government official, b. New York City, grad., City College (B.S., 1958); George Washington Univ...

precession of the equinoxes

(Encyclopedia)CE5 Precession of the equinoxes (the points at which the earth's celestial equator intersects its ecliptic) is due to the slow rotation of the earth's axis around a perpendicular to the ecliptic. ...

Doppler effect

(Encyclopedia)Doppler effect, change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is nam...

comet

(Encyclopedia)CE5 Comet: Whatever the direction of a comet's flight, its “tail” always points away from the sun. The tail disappears when the comet is far from the sun. comet [Gr.,=longhaired], a small cele...

Updike, John

(Encyclopedia)Updike, John, 1932–2009, American author, one of the nation's most distinguished 20th-century men of letters, b. Shillington, Pa., grad. Harvard, 1954. In his many novels and stories, written in a w...

Quetzalcoatl

(Encyclopedia)Quetzalcoatl kĕtˌsälkôätˈəl [key] [Nahuatl,=feathered serpent], ancient deity and legendary ruler of the Toltec in Mexico. The name is also that of a Toltec ruler, who is credited with the disc...

Angelico, Fra

(Encyclopedia)Angelico, Fra frä änjĕlˈĭkō [key], c.1400–1455, Florentine painter, b. Vicchio, Tuscany. He was variously named Guido (his baptismal name), or Guidolino, di Pietro; and Giovanni da Fiesole. Af...

Charles I, king of England, Scotland, and Ireland

(Encyclopedia)Charles I, 1600–1649, king of England, Scotland, and Ireland (1625–49), second son of James I and Anne of Denmark. There were no decisive victories in the civil war until Charles was defeated at...