transition of cracks
71Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …
72Bibliography — CONTENTS Introduction 488 I. General 493 1. Bibliographies and Research Guides 493 2. Directories, Handbooks, Statistical Abstracts, and Yearbooks 494 3. Guides 494 4. Travel and Description 494 II. History 496 1.… …
73Marcel Duchamp — Duchamp redirects here. For other uses, see Duchamp (disambiguation). Marcel Duchamp Marcel Duchamp playing chess in 1952. (Kay Bell Reynal photo in the Smithsonian Institution Archives of American Art.) Birth name …
74Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …
75Polymer-bonded explosive — A polymer bonded explosive, also called PBX or plastic bonded explosive, is an explosive material in which explosive powder is bound together in a matrix using small quantities (typically 5–10% by weight) of a synthetic polymer ( plastic ). Note… …
76Mantle (geology) — For other uses, see Mantle (disambiguation). Earth cutaway from core to exosphere. The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth, similar to the other… …
77Nanoparticle — In nanotechnology, a particle is defined as a small object that behaves as a whole unit in terms of its transport and properties. Particles are further classified according to size[1] : in terms of diameter, coarse particles cover a range… …
78Killer ape theory — The killer ape theory or killer ape hypothesis is the theory that war and interpersonal aggression was the driving force behind human evolution. It was originated by Raymond Dart in the 1950s; it was later notably developed by Robert Ardrey in… …
79Moho line — The Mantle is a part of an astronomical object. Earth s mantle is a 2,900 km thick rocky shell comprising approximately 70% of Earth s volume. It is predominantly solid and overlies the Earth s iron rich core, which occupies about 30% of Earth s… …
80Historic Brattonsville — is a 775 acre American Revolution living history site and is a member of the Culture Heritage Museums of York County, South Carolina. The Bratton Plantation was owned and lived on for three generations by the wealthy Bratton family; the… …
