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space-time

(Encyclopedia)space-time, central concept in the theory of relativity that replaces the earlier concepts of space and time as separate absolute entities. In relativity one cannot uniquely distinguish space and time...

photon

(Encyclopedia)photon fōˈtŏn [key], the particle composing light and other forms of electromagnetic radiation, sometimes called light quantum. The photon has no charge and no mass. About the beginning of the 20th...

Darwinism

(Encyclopedia)Darwinism, concept of evolution developed in the mid-19th cent. by Charles Robert Darwin. Darwin's meticulously documented observations led him to question the then current belief in special creation ...

matter

(Encyclopedia)matter, anything that has mass and occupies space. Matter is sometimes called koinomatter (Gr. koinos=common) to distinguish it from antimatter, or matter composed of antiparticles. The atomic th...

mechanism

(Encyclopedia)mechanism, philosophical theory about the nature of organic systems, holding that organisms are machines in the sense that they are material systems. Mechanism seeks to explain biological processes, i...

Menes

(Encyclopedia)Menes mēˈnēz [key], fl. 3200 b.c., king of ancient Egypt, of the first dynasty, the first Egyptian ruler for whom there are historical records. According to tradition, he seems to have united the s...

Miller, Merton H.

(Encyclopedia)Miller, Merton H., 1923–2000, American economist, grad. Harvard, 1943, Ph.D. Johns Hopkins, 1952. A professor at Carnegie-Mellon Univ. (1953–61) and the Univ. of Chicago (1961–93), he developed ...

Tobin, James

(Encyclopedia)Tobin, James, 1918–2002, American economist, b. Champaign, Ill., Ph.D. Harvard, 1947. A professor at Yale Univ. from 1950 until his death, he was also an influential member (1961–62) of President ...

Genovesi, Antonio

(Encyclopedia)Genovesi, Antonio äntôˈnyō jānōvĕˈzē [key], 1712–69, Italian philosopher and economist, a pioneer in writing philosophy in Italian instead of in Latin. Genovesi introduced new ideas, partic...

Gobineau, Joseph Arthur, comte de

(Encyclopedia)Gobineau, Joseph Arthur, comte de zhôzĕfˈ ärtürˈ kôNt də gōbēnōˈ [key], 1816–82, French diplomat and man of letters. The chief early French proponent of the theory of Nordic supremacy, h...