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roller skating

(Encyclopedia)roller skating, gliding on a hard, smooth, durable surface on skates with rollers or wheels, in recent years has become a popular adult sport. Skates mounted on wooden rollers date from the 1860s, and...

agar, substance obtained from seaweed

(Encyclopedia)agar äˈgär, āˈ–, ăgˈär [key], product obtained from several species of red algae, or seaweed, chiefly from the Ceylon, or Jaffna, moss (Gracilaria lichenoides) and species of Gelidium, harve...

Sault Sainte Marie Canals

(Encyclopedia)Sault Sainte Marie Canals, two ship canals bypassing the rapids on the St. Marys River between Lake Superior and Lake Huron, at the cities of Sault Ste Marie, Mich. and Ont. The Canadian canal (1.4 mi...

Sevan

(Encyclopedia)Sevan syĭvänˈ [key], lake, c.540 sq mi (1,400 sq km), NE Armenia, at an altitude of 6,280 ft (1,914 m); it is 324 ft (99 m) deep. The largest lake of the Caucasus, it is fed by some 30 streams, but...

snow

(Encyclopedia)CE5 Snow occurs in many different forms. Among the various recognized classes of forms are (A) needles; (B) columns and groups of columns; (C) plates; (D) branched, or dendritic, plates; (E) combin...

Scott, Robert Falcon

(Encyclopedia)Scott, Robert Falcon, 1868–1912, British naval officer and antarctic explorer. He commanded two noted expeditions to Antarctica. The first expedition (1901–4), in the Discovery, organized jointly ...

sediment

(Encyclopedia)sediment, mineral or organic particles that are deposited by the action of wind, water, or glacial ice. These sediments can eventually form sedimentary rocks (see rock). Sediments form sedimentary ...

Geikie, Sir Archibald

(Encyclopedia)Geikie, Sir Archibald gēˈkē [key], 1835–1924, British geologist, educated at the Univ. of Edinburgh. He joined the Geological Survey of Scotland, becoming its director in 1867. He was professor o...

Fort Bliss

(Encyclopedia)Fort Bliss, U.S. army post, 1,122,500 acres (454,300 hectares), W Tex., E of El Paso; est. 1849 and named for Col. William Bliss, Gen. Zachary Taylor's adjutant in the Mexican War. Originally strategi...

Fuchs, Sir Vivian Ernest

(Encyclopedia)Fuchs, Sir Vivian Ernest fo͝oks [key], 1908–99, English geologist and explorer, b. Kent, educated at Cambridge. He was a geologist on expeditions to Greenland (1929) and to Africa (1930–38). Afte...