Describes the basic science principles and the history behind many inventions including the printing press, the radio, the locomotive, the electric motor, the telephone, the lightbulb, and the airplan
Describes the basic science principles and the history behind many inventions including weapons and weaponry. Includes hands-on problem solving and make-and-do projects.
Describes the basic science principles and the history behind many inventions including the diving suit, an aqualung, a bathysphere, a submarine, a bathyscaphe, the X-craft, submersibles, the nuclear
