First pub. 1981 . Rewritten and revised text of this science fiction sequel to M̀indwarp' in which the crew of the starship Challenger go in search of their spiritual home, planet Earth, when it vanished from the solar system.

More than 50 educators helped develop 21 different interactive "exhibits" on topics such as Trash, Get Lost, Meet the Humans and Earth: A Wet, Dirty, Bumpy Rock for this hands-on geography museum.

In the mid-1990s, astronomers made history when they began to find planets orbiting stars in the Milky Way. More than eight hundred planets have been found since then, yet none of them is anything like Earth and none could support life. Now, armed with more powerful technology, planet hunters are racing to find a true twin of Earth. Science writer Michael Lemonick has unique access to these exoplaneteers, as they call themselves, and Mirror Earth unveils their passionate quest. Unlike competitors in other races, Geoff Marcy, Bill Borucki, David Charbonneau, Sara Seager, and others actually consult and cooperate with one another. But only one will be the first to find Earth's twin. Mirror Earth tells the story of their competition.

Learn about the plants and animals of the Earth while having fun with search puzzles.

An engaging account of our quest for habitable environments, recounting fascinating recent discoveries and providing insight into future space missions.

The San Francisco Exploratorium squeezed between the covers of a book! The "pages" reflect, magnify, or grow as you follow the instructions. Seven subjects are covered, including light wave craziness, ouchless physics, and hair dryer science.

There is a legendary place in the culture of Arama whose origins are lost in pre-history. It is a place outside the caverns of the free world, peopled with demons and the damned, a place called The Outdoors. Jenine and Ewen believe that it exists, and set out to find it.

In this hard-hitting critique, Carl Boggs argues that the United States is dominated by a new militarism, one that has become more potent and menacing since 9/11. He skillfully explores the origins and development of this new militarism and show its devastating effects on American society.

A thrilling new series soars above the competition and redefines middle-grade fantasy fiction for a new generation!The seven dragon tribes have been at war for generations, locked in an endless battle over an ancient, lost treasure. A secret movement called the Talons of Peace is determined to bring an end to the fighting, with the help of a prophecy -- a foretelling that calls for great sacrifice.Five dragonets are collected to fulfill the prophecy, raised in a hidden cave and enlisted, against their will, to end the terrible war.But not every dragonet wants a destiny. And when the select five escape their underground captors to look for their original homes, what has been unleashed on the dragon world may be far more than the revolutionary planners intended . . .