Lived 1834 - 1907. Dmitri Mendeleev was passionate about chemistry. His deepest wish was to find a better way of organizing the subject. Mendeleev's
Stephen Hawking's Universe: The Web companion piece provides detailed explanations of the most important ideas and developments in human understanding of the universe. The Web pages include original essays by some of today's leading figures in cosmology, along with original illustrations, program descriptions, explanations of cosmological terms and theories, and brief biographies. Also, the Ask the Experts section encourages the audience to submit questions, some of which will be answered by experts in the field.