BBC Online: Sir Isaac Newton: Detailed biography includes a look at Newton's early years and his developing interest in science.
Encarta: Newton, Sir Isaac: Article provides a summary of Newton's life, education, and accomplishments. Includes a look at his impact on science.
Isaac Newton: Short biography and sketch from PBS.
Isaac Newton (1642 - 1727): Detailed biography reproduced from a 1908 history of mathematics.
Newton's Castle: Learn about his discoveries and secret life, color, illusions, and observations from nature.
Newton's Dark Secrets: Articles on aspects of Newton life and legacy, including his main discoveries, his studies in alchemy and the writing of the Principia.
Sir Isaac Newton: A short biography of Sir Isaac Newton along with links to other related subjects.
Sir Isaac Newton: The Universal Law of Gravitation: Provides a simple introduction to the law for which Newton is best known.
Sir Isaac Newton: English Scientist and Mathematician: Short biography and portrait along with related links.
Starchild: Sir Isaac Newton: Short profile, trivia and sketch.
Windows to the Universe: Isaac Newton: Three short biographies for beginning, intermediate and advanced readers.