(Encyclopedia) whale shark, large, plankton-eating shark, Rhincodon typus, found in all tropical seas of the world. Whale sharks are the largest fish in the world. A female typically reaches about 46…
(Encyclopedia) heartburn, burning sensation beneath the breastbone, also called pyrosis. Heartburn does not indicate heart malfunction but results from nervous tension or overindulgence in food or…
(Encyclopedia) sleep apnea, episodes of interrupted breathing during sleep. Obstructive sleep apnea is a common disorder in which relaxation of muscles in the throat repeatedly close off the airway…
Water FantasyFannie Stearns DavisO brown brook, O blithe brook, what will you say to me
If I take off my heavy shoon and wade you childishly? O take them off, and come to me.
You shall…
(Encyclopedia) skin diving, act of swimming freely underwater. It is done with the aid of a face mask, swimming fins for the feet, and either a snorkel breathing tube or scuba [acronym for self-…
(Encyclopedia) subduction zone, large-scaled narrow region in the earth's crust where, according to plate tectonics, masses of the spreading oceanic lithosphere bend downward into the earth along the…
(Encyclopedia) Ballard, Robert DuaneBallard, Robert Duanebălˈərd [key], 1942–, American marine geologist, b. Wichita, Kans.; Ph.D. Univ. of Rhode Island, 1974. From 1969 to 1997 he was associated…
(Encyclopedia) Kootenay National Park, 543 sq mi (1,406 sq km), SE British Columbia, Canada; est. 1920. In the Rocky Mts. near Kootenay Lake, it contains high peaks, glaciers, deep canyons, and hot…
(Encyclopedia) Sigsbee, Charles Dwight, 1845–1923, American naval officer, b. Albany, N.Y. He saw service in the Gulf of Mexico in the Civil War, was subsequently stationed with the Asian squadron,…
(Encyclopedia) Zion National Park, 146,592 acres (59,349 hectares), SW Utah. First proclaimed a national monument in 1909, it was enlarged several times and established as a national park in 1919.…
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