Science

Discusses the correspondence between the two, their priority dispute, and their amicable resolution of it. By Ivan T. Todorov.

An outline of the development of the theory, including a summary of relevant earlier work (from Aristotle to Maxwell); from the MacTutor History of Mathematics Archive (University of St. Andrews).

Website by the Max Planck Institute for the History of Science (Berlin) presenting the seminal articles on relativity and other subjects that Einstein published in the physics journal "Annalen der Physik"; also includes four introductory essays based on recent historical studies.

Concise summary of the history of special relativity, from Maxwell and Lorentz to Einstein; from the MacTutor History of Mathematics Archive (University of St. Andrews).

Wikipedia article about the Italian industrialist and claims that he published the famous formula E=mc² two years before Einstein did.

Wikipedia article on the genesis and development of special relativity and its precursors.

Wikipedia article about the various contributors to special and general relativity, and about the contentious questions of who has priority on the different ideas and concepts involved, and in how far Einstein was influenced by his contemporaries and predecessors.

Identifies the contributions made to the special theory of relativity by Poincaré and argues that the theory "has been created not by A. Einstein only but even to a greater extent by Poincaré." By A. A. Logunov.

About the development of general relativity, Einstein's early rejection of Lorentz-covariant theories of gravity, and Nordström's attempts at formulating just such a model. By J. D. Norton (University of Pittsburgh).

Wikipedia article on the development of relativity. Includes sections about observational tests and alternative theories.

New York Times article on the 1919 eclipse observations by two British expeditions, which confirmed the predictions of general relativity for light deflection near the sun.