Clouds come in all sorts of types, including cumulus, cumulonimbus, stratus, and cirrus. Learn how to tell each cloud type apart.

Explains what causes wind, the various kinds of wind, and describes hurricanes and tornadoes.

Describes various types of lightning and explains what causes lightning.

Just over a year ago, Captain James T. Kirk was lost to the Nexus while saving the U.S.S. Enterprise 1701-B from destruction. Aboard the science ship Intrepid II, Captain Spock, commanding some of his old crewmates, must face the loss of his closest friend. But while still in mourning for one friend, he must come to the aid of another. Decades ago, Spock had teamed up with David Rabin, the young son of a Starfleet Captain, to fight an attempted coup...

"Explains what causes wind, the various kinds of wind, and describes hurricanes and tornadoes." --

Describes how rain falls, the water cycle, where and how often rain falls, why rain is necessary, and problems caused by too much or too little rain. "¡qu llueva, que llueva! ¿Quieres que deje de llover? Descubre por qué la lluvia es importante. Descubre qué pasa cuando llueve muy poco o cuando llueve mucho. Aprende cómo se forma la lluvia"--Container.

A biography of the developer of Microsoft, Bill Gates, with details of his life and a look at the beginnings of the personal computer industry.

Outlines the events of this English explorer's famous Arctic journeys and his search for the Northwest Passage to Asia.

Discusses the anatomy and functions of the human ear.