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Discusses supersonic jets, including how they are built, different types, and what they are used for. -
Photographs and text reveal information about the longest bridge in the world, including its location, how it was built, and the safety issues involved in its upkeep. -
Describes the eight phases of the moon, from new moon to waning crescent; the moon's size; the length of its days; its rotation, gravity, surface, and temperature; and eclipses.
