Express yourself while looking and feeling good doing it. Our shirts are not only expressive, but they're also printed using our specially developed environmentally friendly methods. We care about the environment and know there's a whole lot we can do to make this a better world, starting with our own back yard. The blank shirts we print on are made from the finest cotton, and are guaranteed sweatshop free. So get Grumpy and see how good it feels.

Today's rockets are remarkable collections of human ingenuity. NASA's Space Shuttle, for example, is one of the most complex flying machines ever invented. It stands upright on a launch pad, lifts off as a rocket, orbits Earth as a spacecraft, and returns to Earth as a gliding airplane. The Space Shuttle is a true spaceship. In a few years it will be joined by other spaceships. The European Space Agency is building the Hermes and Japan is building the HOPE. Still later may come aerospace planes that will take off from runways as airplanes, fly into space, and return as airplanes.

The rockets and spaceships of today and the spaceships of the future have their roots in the science and technology of the past. They are natural outgrowths of literally thousands of years of experimentation and research on rockets and rocket propulsion.

One of the first devices to successfully employ the principles essential to rocket flight was a wooden bird. In the writings of Aulus Gellius, a Roman, there is a story of a Greek named Archytas who lived in the city of Tarentum, now a part of southern Italy. Somewhere around the year 400 B.C., Archytas mystified and amused the citizens of Tarentum by flying a pigeon made of wood. It appears that the bird was suspended on wires and propelled along by escaping steam. The pigeon used the action-reaction principle that was not to be stated as a scientific law until the 17th century.

About three hundred years after the pigeon, another Greek, Hero of Alexandria, invented a similar rocket-like device called an aeolipile. It, too, used steam as a propulsive gas. Hero mounted a sphere on top of a water kettle. A fire below the kettle turned the water into steam, and the gas traveled through pipes to the sphere. Two L-shaped tubes on opposite sides of the sphere allowed the gas to escape, and in doing so gave a thrust to the sphere that caused it to rotate.

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