Stuart Clark's new book sweeps over you like a maelstrom of names, places and ideas. In The Unknown Universe, Clark sets out to describe the state of our knowledge — and lack thereof — about central ...

American Scientist (ISSN 0003-0996) is an illustrated bimonthly magazine about science and technology. Each issue is filled with feature articles written by prominent scientists and engineers, ...

An Introduction to Cosmology. By Dr. G. J. Whitrow. (Hutchinson's University Library, No. 29.) Pp. 171. (London: Hutchinson's University Library, 1949.) 7s. 6d. net.