Lenses

By Siegfried Aust

Flight!

By Siegfried Aust

Traces the history of human flight from Greek mythology to the space shuttle. Includes related activities.

Lenses! take a closer look

By Siegfried Aust

Explains all about lenses, magnifying glasses, telescopes, microscopes, eyeglasses, vision, and eye care.

Communication!

By Siegfried Aust

Explains different ways people have communicated throughout history up to the present day, including carrier pigeon, smoke signals, and fax.

Clocks!

By Siegfried Aust

Discusses time, the invention of clocks to keep track of daily activities, and types of clocks from sundial and water clock to electric and atomic clocks.

Light

By Siegfried Aust

Discusses the invention and development of lamps and other light sources, from kerosene lamps and gaslight to laser beams.

Ships!

By Siegfried Aust

Traces the history of water transportation from rafts and kayaks to modern ocean liners and war ships. Includes related activities.

Rund um die Post

By Siegfried Aust

Aus Erziehungs-, Sozial- und Geisteswissenschaften

By

Von Marathon zum Telephon. Nachrichten gehen auf die Reise

By