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Ursa Major and Ursa Minor
(Encyclopedia)Ursa Major ûrˈsə [key] and Ursa Minor [Lat.,=the great bear; the little bear], two conspicuous northern constellations. Known to many peoples from ancient times, these constellations have had vario...taconite
(Encyclopedia)taconite, low-grade iron ore, a flintlike rock usually containing less than 30% iron. Resistant to drilling and to the extraction of its contained metal, the rock was long considered worthless. Experi...Garden of the Gods
(Encyclopedia)Garden of the Gods, park, 770 acres (312 hectares), central Colo., near Colorado Springs; noted for its unusual, multicolored rock formations. Narrow-crested sandstone hills and ridges have been erode...Crow, indigenous people of North America
(Encyclopedia)Crow, indigenous people of North America whose language belongs to the Siouan branch of the Hokan-Siouan linguistic stock (see Native American languages) and who call themselves the Absaroka, or bird ...murre
(Encyclopedia)murre mör [key], common name for a group of diving birds of the same family as the auk and the puffin (family Alcidae) and including the guillemots. There are three species of murres, all about 18 in...pika
(Encyclopedia)pika pīˈkə [key], short-haired mammal related to rabbits and hares, also called mouse hare and rock rabbit. Pikas live above the timber line in the mountains of N Asia and W North America. The pika...porphyry, igneous rock
(Encyclopedia)porphyry pôrˈfərē [key], igneous rock composed of large, conspicuous crystals (phenocrysts) and a groundmass in which the phenocrysts are embedded. Some authorities consider the expression “porp...music video
(Encyclopedia)music video, videotaped performance of a recorded popular song, usually accompanied by dance or a fragmentary story and sometimes employing concert footage. Typically three to five minutes long, music...Sitting Bull
(Encyclopedia)Sitting Bull, c.1831–1890, Native American chief and spiritual leader, Sioux leader in the battle of the Little Bighorn. He rose to prominence in the Sioux warfare against the whites and the resista...Atlas Mountains
(Encyclopedia)Atlas Mountains, system of ranges and plateaus in NW Africa, extending c.1,500 mi (2,410 km) from SW Morocco, through N Algeria, to N Tunisia; Jebel Toubkal (13,671 ft/4,167 m), in SW Morocco, is the ...Browse by Subject
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