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Timmins

(Encyclopedia) Timmins, town (1991 pop. 47,461), central Ont., Canada, on the Mattagami River. Timmins is the commercial center of the rich Porcupine gold-mining district, where gold was first…

temperature inversion

(Encyclopedia) temperature inversion, condition in which the temperature of the atmosphere increases with altitude in contrast to the normal decrease with altitude. When temperature inversion occurs…

Wheeler, John Archibald

(Encyclopedia) Wheeler, John Archibald, 1911–2008, American physicist and educator, b. Jacksonville, Fla. Educated at Johns Hopkins (Ph.D., 1933), he joined the faculty at Princeton in 1938, and…

Rossiter, Thomas Pritchard

(Encyclopedia) Rossiter, Thomas Pritchard, 1818–1871, American historical painter, b. New Haven, Conn. He spent many years in Europe, studying and painting, and settled finally in Cold Spring, N.Y.,…

Niflheim

(Encyclopedia) NiflheimNiflheimnēˈfəlhīmˌ [key], in Norse mythology, lowest region of the underworld. A land of mist and cold, Niflheim was sometimes called the home of the dead. See also Hel.

Seward Peninsula

(Encyclopedia) Seward Peninsula, W Alaska, projecting c.200 mi (320 km) into the Bering Sea between Norton Sound and Kotzebue Sound, just below the Arctic Circle. The region is mostly bleak tundra,…

Carpathians

(Encyclopedia) CarpathiansCarpathianskärpāˈthēənz [key] or Carpathian Mountains, Czech, Pol., and Ukr. Karpaty, Rom. Carpaţii, major mountain system of central and E Europe, extending c.930 mi (1,500…

Beaver Falls

(Encyclopedia) Beaver Falls, city (2020 pop. 8,232), Beaver co., W Pa., on falls of the Beaver River near its junction with the Ohio; settled c.1793,…

coronavirus

(Encyclopedia) coronavirus, any of a group (family Coronaviridae, subfamily Orthocoronavirinae) of enveloped single-stranded RNA viruses that have a crownlike or sunlike appearance under an electron…

humidity

(Encyclopedia) humidity, moisture content of the atmosphere, a primary element of climate. Humidity measurements include absolute humidity, the mass of water vapor per unit volume of natural air;…