Online help for creating bibliographies.

There are more than a half a million bridges in the United States, and you rely on them every day to cross obstacles like streams, valleys, and railroad tracks. But do you know how they work? Or why some bridges are curved while others are straight?

With the exception of the Great Wall of China, dams are the largest structures ever built. Throughout history, big dams have prevented flooding, irrigated farmland, and generated tremendous amounts of electricity. 

They have been called "the king of all roofs", and they cover some of our most important buildings. Domes are curved structures - they have no angles and no corners - and they enclose and enormous amount of space without the help of a single column.

Feeling bored? Not any more - that is if you visit this site. Science topics found here include navigation, space, time, water, people, and plants, small and tall, earth sounds, using tools, trees and seeds, and more.9576

earn how everythings works, from cells to fuel gauges! This is truly an incredible site, especially for those with an insatiable curiously to tinker!

This site is intended for students age 14 and up, and for anyone interested in learning about our universe. This site will give young people a glimpse into the mysteries of our universe, what we know about it, how it is evolving, and the kinds of object in it.

Great site which is 1000 sites in one, with interactive activities for all subjects (or just for fun).

Would you like to find out about inventions? This website has information about inventors and inventions. It also supplies information on what to do when you want to patent and invention on your own.

On any given day NOAA personnel could be chasing tornadoes, flying into hurricanes, battling stormy seas, tagging turtles and whales, taking scientific readings at the South Pole, monitoring the health of coral reefs, or engaging in virtually any task.

Are you interested in earthquakes as a science fair topic? Turn to this site as you begin your study; there are links to valuable resources such as completed science fair projects on the topic, how to build a seismometer, geology activites for all interested students.

The Royal Observatory Greenwich is part of the National Maritime Museum and home of the Prime Meridian of the world. Visit this site to learn about time (e.g., there is a map that shows the area of the world covered by darkness and light), seasons, and much more.

Try a self-guided science lesson and learn more about space and astronomy. Choose an interview to hear what solar scientists have to say about the sun. Find out about the latest astronomical news and events.

This incredible site has the most up-to-date information on things that are happening to our planet and beyond. If you want to know the latest - space, earthquake, Mission launches, weather, tides, volcanoes, and more - you must visit the Zone.

These fun DIY engineering and at-home activities can be put together with inexpensive store-bought materials or objects you find around the house.

Tunnels provide some of the last available space for cars and trains, water and sewage, even power and communication lines. Today, it's safe to bore through mountains and burrow beneath oceans - but it was not always this way.

The Why Files cover issues of science, health, environment, and technology from a unique perspective. Using news and current events as a springboard to explore science and the larger issues it raises, they hope to show science as a human enterprise.

The Invention site is great for a researcher. If you know the name of a specific inventor, you can look him or her up alphabetically. Or, you can look for the region of the world or the era in which the subject was invented.