extinction+of+life
71Ectopistes migratorius — Extinction Ex*tinc tion, n. [L. extinctio, exstinction: cf. F. extinction.] 1. The act of extinguishing or making extinct; a putting an end to; the act of putting out or destroying light, fire, life, activity, influence, etc. [1913 Webster] 2.… …
72History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… …
73Triassic Period — Interval of geologic time, с 248–206 million years ago, that marks the beginning of the Mesozoic Era. Many new vertebrates emerged during the Triassic, heralding the major changes that were to occur in both terrestrial and marine life forms… …
74Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …
75Peter Ward (paleontologist) — Peter Douglas Ward is a paleontologist and professor of Biology and of Earth and Space Sciences at the University of Washington, Seattle, as well as an author of popular science works for a general audience. Life and workWard s academic career… …
76Geology of Scotland — The geology of Scotland is unusually varied for a country of its size, with a large number of differing geological features. [Keay Keay (1994) op cit page 415.] There are three main geographical sub divisions: the Highlands and Islands is a… …
77Dennis V. Razis — (born 30 May 1923) is the first practitioner of formal Oncology in modern Greece. He is also the President of the Delphi Society, an interdisciplinary assembly of philosophers and scientists concerned with the social and ecological crises that… …
78lake — lake1 /layk/, n. 1. a body of fresh or salt water of considerable size, surrounded by land. 2. any similar body or pool of other liquid, as oil. 3. (go) jump in the lake, (used as an exclamation of dismissal or impatience.) [bef. 1000; ME lak(e) …
79Lake — /layk/, n. Simon, 1866 1945, U.S. engineer and naval architect. * * * I Relatively large body of slow moving or standing water that occupies an inland basin. Lakes are most abundant in high northern latitudes and in mountain regions, particularly …
80Vincent Courtillot — Vincent E. Courtillot (b. March 6, 1948) is a contemporary French geophysicist, prominent among the researchers who are critical of the hypothesis that impact events are a primary cause of mass extinction of life forms on the Earth. Courtillot is …
