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"Discusses comets, asteroids, and meteors, including how and where they are formed in space, what scientists are doing to study and track them, and what danger these doomsday rocks are to Earth"--Provided by publisher.

A biography of the thirty-ninth President of the United States.

Discusses the planning, development, and launching of the Voyager 2 spacecraft and what happens to the data it transmits to earth.

A biography of the Christian missionary who helped the Tsimshian Indians establish a new home in Alaska.

Volume Three. -- "The New York Times Book Review"