Ask a Biology Expert at Scientific American If you've got a biology stumper then this is the place to lodge the question. Don't forget to check out the  
archive site for other questions.
 
Ask Jeeves for Kids If you've got a pressing question that needs an answer then this place could help.
 
Double Helix Club Filled with great research material and simple experiments able to be safely completed at home.
 
Exploratorium The museum of science art and human perception has great hands-on science activities and online exhibitions investigating the science behind the ordinary subjects and experiences of people's lives. Want to find out about the  
inside of a cow's eye? Then here is the place to go.
 
Explore Science Animated demonstrations and interactive activities explain scientific concepts and applications happening in our planet.
 
The Lab Within this site there is a plethora of great science information and reference material including  
science news from Australia and around the world. Don't miss  
Dr. Karl's Great Moments in Science for explanations about how skin color is determined, cloning and lots of other great moments in science.
 
Mad Scientist Network Scientists (who really aren't mad) from all over the world are here to answer your science questions. Search the archive of questions and answers and look at the  
"mad labs".
 NOVA The website of the most watched science program is filled with great science information. It contains video clips and additional facts about the broadcast shows. Look also at the  
previous sites for more information.
 
The Why Files This site has lots of great scientific reference material about many science happenings. Also visit  
Cool Science Images for amazing images.
 
Yucky Stuff The yuckiest site on the net has to be here. There are experiments and information including the facts on those wonderful creatures worms and cockroaches.