there must be an explanation
111medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
112Government procurement in the United States — is based on many of the same principles as commercial contracting, but is subject to special laws and regulation as described below. Persons entering into commercial contracts are pretty much free to do anything that they can agree on. Each… …
113Aristotle — For other uses, see Aristotle (disambiguation). Ἀριστοτέλης, Aristotélēs Marble bust of Aristotle. Roman copy after a Gree …
114Empiricism — John Locke, a leading philosopher of British empiricism This article is about the field of philosophy. For the album by Borknagar, see Empiricism (album). Empiricism is a theory of knowledge that asserts that knowledge comes only or primarily via …
115Nuclear weapon design — The first nuclear weapons, though large, cumbersome and inefficient, provided the basic design building blocks of all future weapons. Here the Gadget device is prepared for the first nuclear test: Trinity. Nuclear weapon designs are physical,… …
116Shmita — (Hebrew: שמיטה, literally release ), also called the Sabbatical Year, is the seventh year of the seven year agricultural cycle mandated by the Torah for the Land of Israel, and still observed in contemporary Judaism. During Shmita, the land is… …
117United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
118subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …
119property law — Introduction principles, policies, and rules by which disputes over property are to be resolved and by which property transactions may be structured. What distinguishes property law from other kinds of law is that property law deals with… …
120Inflation (cosmology) — Inflation model and Inflation theory redirect here. For a general rise in the price level, see Inflation. For other uses, see Inflation (disambiguation). Physical cosmology …
