Degenerate Gas

In physics, a particular configuration, usually reached at high densities, of a gas composed of subatomic particles with half-integral intrinsic angular momentum (spin). Such particles are called fermions, because their microscopic behaviour is regulated by a set of quantum mechanical rules—Fermi-Dirac statistics (q.v.). These rules state, in particular, that there

Wigglesworth, Sir Vincent (brian)

English entomologist, noted for his contribution to the study of insect physiology. His investigations of the living insect body and its tissues and organs revealed much about the dynamic complexity of individual insects and their interactions with the environment. His Insect Physiology (1934) is often

Andrade, Mário De

Educated at the conservatory in São Paulo, Andrade helped organize what proved to be a key event in the