How a Helicopter Works Read about helicopters, how they work, and how controlling a helicopter is different from controlling other kinds of transportation.

Solar Sails Scientists and engineers are working on designing solar sailing spacecraft. Here you can see some of their designs and read more about how solar sailing works. You also will find links to more sites on solar sailing. Sailing to the Stars Learn about NASA’s plan to launch the Interstellar Probe, a solar sailing spacecraft in 2005.

Inventions of Ancient China Many things we use today were invented in ancient China. See what some of these inventions and learn more about Chinese technology are at this student designed ThinkQuest site More About Chinese Inventions Learn about the Chinese inventions: paper, gunpowder, compasses and moveable print at the Franklin Institute. Brief descriptions of these inventions are described and pictures of each are included.