key cycle period
71chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
72painting, Western — ▪ art Introduction history of Western painting from its beginnings in prehistoric times to the present. Painting, the execution of forms and shapes on a surface by means of pigment (but see also drawing for discussion of depictions in …
73theatre, Western — ▪ art Introduction history of the Western theatre from its origins in pre Classical antiquity to the present. For a discussion of drama as a literary form, see dramatic literature and the articles on individual national literatures.… …
74HIV — Classification and external resources Diagram of HIV …
75Subprime mortgage crisis — Part of a series on: Late 2000s financial crisis Major dimensions …
76anthropology — anthropological /an threuh peuh loj i keuhl/, anthropologic, adj. anthropologically, adv. /an threuh pol euh jee/, n. 1. the science that deals with the origins, physical and cultural development, biological characteristics, and social customs… …
77cryptology — cryptologist, n. cryptologic /krip tl oj ik/, cryptological, adj. /krip tol euh jee/, n. 1. cryptography. 2. the science and study of cryptanalysis and cryptography. [1635 45; < NL cryptologia. See CRYPTO , LOGY] * * * Introduction …
78Economic growth — GDP real growth rates, 1990–1998 and 1990–2006, in selected countries …
79environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
80UNITED STATES OF AMERICA — UNITED STATES OF AMERICA, country in N. America. This article is arranged according to the following outline: introduction Colonial Era, 1654–1776 Early National Period, 1776–1820 German Jewish Period, 1820–1880 East European Jewish Period,… …
