Leo Schneider, an award-winning author of science books, was Senior Science Editor for the Book of Knowledge Encyclopedia.
Sep 01 1988
The Harper Dictionary of Science in Everyday Language: Scientific Terms Explained So You Can Really Understand Them
The relativity theories of Albert Einstein (1879-1955) deal with the most fundamental descriptions of the physical universe: the concepts of time, space, motion, mass and gravitation. To attempt to “explain” (rather than describe) them here would be an act of presumption, for the following reasons: