:: National Center for Biotechnology Information
	Free information in the fields of biology related to biomedicine and biotechnology.
:: National Oceanic & Atmospheric Administration
	Contains educational materials and links to subsites related to atmospheric and oceanic sciences.
:: National Aeronautics and Space Administration
	Contains educational materials for teachers and students on aeronautics and space sciences.
:: 4000 Years of Women in Science
	This is a compilation of information about more than 125 women in science, including biographies and photographs.
:: American Institute of Physics
	Links to information and resources about physics.
:: ChemDex
	A directory of chemistry-related definitions and Internet sites links.
:: Franklin Institute Online
	Science resources for parents and teachers, including classroom activities.
:: Harvard University--Biology Links
	A list of biology links compiled by Harvard University's Department of Molecular and Cellular Biology.
:: Museum of Science and Industry, Chicago
	Besides museum information, this site contains educational resources for teachers and parents.
:: The American Association for the Advancement of Science (AAAS)
	AAAS general information, as well as links to information on science education, human rights, ethics, and policies.
:: The Environmental Protection Agency (EPA)
	Your source for federal environmental laws and regulations, EPA programs, and links to other environmental resources.
:: Weather.com
	The Weather Channel's news and weather information online.