Science

Space

• SKY & TELESCOPE 
• The NASA Homepage 
• NASA - JSC Digital Image Collection Home 
• Comets
• Meteor Showers 
• Hubble Space Telescope
• JPL's Space Calendar
  celestial events, events in space history

Gardening and Biology

• The National Agricultural Library
  including access to Agricola, the NAL's journal citation index
• CSU BioWeb
  California State University BIOlogical WEB server. An extensive and nicely annotated collection of links to information in the biological sciences.
• GardenWeb
  gardening tips and information, & links to other gardening information resources on the Internet
• Texas Integrated Pest Management - How to treat bugs, weeds and diseases for lawns, crops, vegetables, ornamentals, citrus and more 
• AgWeb 
• Texas Farm Bureau 
• CELLS alive! 

Earth sciences

• Earthquake Information from the USGS 
• Environmental Organization WebDirectory 
• Global Volcanism Program 

Time & Measurement

• Megaconverter - What equals what? 
• Time Service Dept. 
• Calendar
• Calendar Zone

Miscellaneous

• U.S. patent database 
• The Why Files: science behind the news 
• Ask Dr. Math 
• A Periodic Table of the Elements at Los Alamos National Laboratory 
• Fundamental Physical Constants 
• Endangered Species Home Page 
• The Nobel Prize Internet Archive 
• Dinosauria