The Canadian Encyclopedia
EPA Student's Page Information on issues which impact our environment from the U.S. Environmental Protection Agency.
Geologic Time Scale from the University of California at Berkeley.
Astronomy & Space Information from NASA
Endangered Species Page Information on endangered species from the United States Fish and Wildlife Service.
Information on the Nobel Prize and its recipients.
Explore the 20th century using information from The Information Please Almanac, Encyclopedias, Atlases and more.
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Biographies of 18,000+ Persons
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