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Science and Technology  

General

National Science Foundation

Scientific American [The magazine, plus a whole lot more]

Web Elements [Periodic Table, etc.]

Why Files [Science info for kids.]

Reference

Conversion of Units

Physical Reference Data

History of Science, Technology and Medicine

Kitchen measurement conversion table

Morse Code Conversion Table

Periodic Table

PubSCIENCE [DOE's Office of Scientific and Technical Information]

Science.gov [Physical Sciences]

USDA Economics and Statistics System

Astronomy

AstroWeb: Astronomy/Astrophysics on the Internet

Information on Comet Hale-Bopp for the Non-Astronomer

Mars Pathfinder - NASA

NASA

NASA Information Locator Service

NASA Jet Propulsion Lab

The Nine Planets [A Multimedia Tour of the Solar System]

Space Shuttle Facts and Statistics

Botany

New York Botanical Garden Library

PLANTS Database Home Page - (USDA) [Standardized plant names, symbols and other plant attribute information]

National Agricultural Library

Chemistry

Internet Chemistry Resources

Earth Sciences

National Oceanic & Atmospheric Administration (NOAA) Site

NOAA Environmental Data

Engineering

The Engineering Design Research Center

Engineering - Virtual Library

Mathematics

Mathematics on the Web [Penn State Dept of Mathematics]

Natural History

Arctic Studies Center

Paleontology

PaleoNet

Learning from the Fossil Record

Museum of Paleontology - University of California

Paleontological Society Homepage

Physics

Fermi National Accelerator Laboratory

PhysicsWeb

Zoology

Animal Information Data Base [Animal World]

Internet Resource Guide for Zoology

The Electronic Zoo

Salisbury Zoo

Zoological Record Taxonomic Hierarchy

News

The Scientist: The Newspaper for the Life Sciences Professional

InterJournal - [Science and engineering]