Overview
Insightful Biographies
This impressive list includes Aristotle, Jacques-Yves Cousteau, Marie Curie, Charles Darwin, Joycelyn Elders, Stephen Hawking, Guglielmo Marconi, Alfred Nobel, Nostradamus, Louis Pasteur, Ptolemy, Carl Sagan, Benjamin Spock, and many others.
Broad Coverage
Featured articles such as Atmospheric Science, Biology, Climatology, Geology, Medicine, Nobel Prize, Oceanography, and Physiology are among the 1,850 entries.
Fascinating Multimedia
View the evolving theories on the solar system over time. Learn about the lives and achievements of Marie Curie, Albert Einstein, and Jonas Salk. See the impact of the equinox on our seasons. Engaging multimedia plus more than 700 photos, images, and tables accompany the articles.
Quick Vocabulary Help
Merriam-Webster's Collegiate Dictionary and Thesaurus provide instant vocabulary help with unfamiliar terms.