Demonstrates that man has devised ways of making work easy with the aid of simple tools, engines and motors, and by harnessing such natural forces as...
Considers how Anglo-Saxon England was built by many different peoples and cultures. Re-enacts important historical events. Shows authentic landmarks...
Discusses the need for the Falcon Dam to aid in drought, flood control, and irrigation, then describes a severe flood that occurred within a year of...
Twenty-eight years since the rage virus escaped a biological weapons laboratory, now, still in a ruthlessly enforced quarantine, some have found ways...
