Each January Americans celebrate the life and achievements of Martin Luther King Jr., a key leader of the Civil Rights movement.

Find out how the provinces and territories work together in a national government.

Photographs and text present information about the surface, orbit, and phases of the moon, its effect on the Earth's tides and lunar exploration.

Presidents Day honors two men who led the U.S. through difficult times--Washington during the nation's birth, and Lincoln during the Civil War.

Describes the nature and movements of comets and meteors and examines what happens to meteors after they hit the Earth.

This series takes kids on a journey through history to trace the origins of the symbols of the United States.

This series takes kids on a journey through history to trace the origins of the symbols of the United States.

Mighty glaciers inch across the face of the northern Rocky Mountains. Watch tons of water plunge 180 feet over Niagra Falls. Over 1,500 parks work to preserve Canada's natural beauty.