Many of today's popular sports are based around the use of a ball, yet none are completely alike. In fact they are all designed with specific characteristics in mind. Students will investigate different balls' abilities to bounce and...

Discusses the technological and political conditions which led to Robert Fulton's invention and development of the submarine. Includes some biographical information and some graphics of early submarine sketches. (Text is the actual radio...

Here you will find the story of how and why time zones came about and the Canadian who developed the system that has become so important around the world. Be sure to read the "Incidents and Anecdotes" section to find interesting facts...

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