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snowball earth

(Encyclopedia)snowball earth, hypothesized condition in which the earth was covered completely by ice during several periods in the Proterozoic. The hypothesis was originally developed to explain evidence of the co...

rainmaking

(Encyclopedia)rainmaking, production of rain by artificial means now generally disregarded, though it is probable that rainmaking hastens or increases rainfall from clouds suitable for natural rainfall. Interest in...

handball, team

(Encyclopedia)handball, team, or field handball, team court game. Despite its status as an Olympic sport, the game is virtually unknown in the United States. Originated in central Europe in the early 1900s as an ou...

glacial periods

(Encyclopedia)glacial periods, times during which large portions of the earth's surface were covered with thick glacial ice sheets. In the Pleistocene epoch, in the Carboniferous and Permian periods of the Paleozoi...

icebreaker

(Encyclopedia)icebreaker, ship of special hull design and wide beam, with relatively flat bottom, designed to force its way through ice. When the icebreaker charges into the ice at full speed, its sharply inclined ...

Waterford, town, United States

(Encyclopedia)Waterford, town (1990 pop. 17,930), New London co., SE Conn., on Long Island Sound; settled c.1653, inc. as a separate town from New London, 1801. Mainly residential, it has a recording and film studi...

New Siberian Islands

(Encyclopedia)New Siberian Islands, Rus. Novosibirskiye Ostrova, archipelago, c.10,900 sq mi (28,200 sq km), N Siberian Russia, in the Arctic Ocean between the Laptev and East Siberian seas, part of the Sakha Repub...

skydiving

(Encyclopedia)skydiving, sport of descending partly by parachute from an airplane or similar craft. Engaged in for both recreational and competitive purposes, skydiving involves three phases of activity: the free f...

boxing

(Encyclopedia)boxing, sport of fighting with fists, also called pugilism and prizefighting. Amateur boxing, while not free from debate, has in recent decades taken steps to ensure safety and objective judging. Th...

Camp, Walter Chauncey

(Encyclopedia)Camp, Walter Chauncey, 1859–1925, American athlete, football coach, administrator, b. New Britain, Conn. In his three years as captain at Yale Univ. in the 1880s, Camp shaped the rules that transfor...