(Encyclopedia) coral, small, sedentary marine animal, related to the sea anemone but characterized by a skeleton of horny or calcareous material. The skeleton itself is also called coral. Although…
(Encyclopedia)
CE5
Arctic, the northernmost area of the earth, centered on the North Pole. The arctic regions are not coextensive with the area enclosed by the Arctic Circle (lat. 66°30′N) but are…
(Encyclopedia) SahelSahelsähĕlˈ [key], name applied to the semiarid region of Africa between the Sahara to the north and the savannas to the south, extending from Senegal and Mauritania on the west,…
(Encyclopedia) taigataigatīˈgə [key], northern coniferous-forest belt of Eurasia, bordered on the north by the treeless tundra and on the south by the steppe. This vast belt, comprising about one…
WHICH FEATURES DO ALL ANIMALS HAVE IN COMMON? WHAT IS THE WORLD’S FASTEST ANIMAL? WHAT ARE WARM-BLOODED ANIMALS? HOW BIG DO ANIMALS GROW? BEHAVIORFIND OUT MOREAnimals are grouped into two main…
(Encyclopedia) mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five…
(Encyclopedia) Mittal, Lakshmi Narayan, 1950–, Indian steel tycoon. He worked at his father's small Kolkata (Calcutta) steel mill before he bought (1976) a mill in Indonesia and began to build his…
(Encyclopedia) Bentham, GeorgeBentham, Georgebĕnˈthəm [key], 1800–1884, one of the greatest of English systematic botanists; nephew of Jeremy Bentham. He wrote Handbook of British Flora (1858) and,…
(Encyclopedia) Bill and Melinda Gates Foundation, philanthropic institution founded in 1994 by Microsoft chairman Bill Gates and his wife, Melinda, to improve the lives of the poor throughout the…
Sources: NASA and Massachusetts Institute of Technology. A new tool to help scientists, the media, and the public assess the potential danger of asteroids…
