Excerpt: "The first two decades of the twentieth century will rank as a most distinguished era in the history of exploration, for during them many of the great geographical riddles of the world have been solved. This book contains a record of some of the main achievements. What Nansen said of Polar exploration is true of all exploration; its story is a "mighty manifestation of the power of the Unknown over the mind of man." The Unknown, happily, will...

A tale set in a world in which technological advances have been suppressed finds particle physicist Jon Grady helping to innovate a device capable of reflecting gravity only to be targeted by a shadowy organization from the future.

The world's bestselling master of the medical thriller, Robin Cook skillfully combines human drama and high-tech thrills with the latest breakthroughs and controversies of modern medicine. Now, in his most daring novel yet, a mysterious transmission from the bottom of the Atlantic Ocean leads a crew of oceanographers and divers to a phenomenon beyond scientific understanding - a discovery that will change everything we know about life on Earth…...

"Explore the fascinating history of earth and space science! What are Earth's systems, cycles, and resources? What are the solar system, lunar phases, and gravity? Who first studied these concepts? And who later used those early theories to develop these ideas further?"--

During the California Gold Rush, a young woman's plans to marry are opposed by her father, who wants her to mary a rich man.

"You might know that Columbus discovered America, Lewis and Clark headed west with Sacajawea, and Sally Ride blasted into space. But what do you really know about these bold explorers? What were they like as kids? What pets or bad habits did they have? And what drove their passion to explore unknown parts of the world? With juicy tidbits about everything from favorite foods to first loves, Lives of the Explorers reveals these fascinating adventurers...

"On November 8, 1519, the Spanish conquistador Hernando Cortés first met Montezuma, the Aztec emperor, at the entrance to the capital city of Tenochtitlan. This introduction--the prelude to the Spanish seizure of Mexico City and to European colonization of the mainland of the Americas--has long been the symbol of Cortés's bold and brilliant military genius. Montezuma, on the other hand, is remembered as a coward who gave away a vast empire and touched...

"Detective thriller meets astrophysics in this adventure into neutrinos and the scientists who pursue them"-- Provided by publisher.

Readers will explore Mars' hold on humankind's imagination, early astronomical observations, and then trace the cultural history of the Red Planet all the way up to today's popular movies and books. Important details will include examinations of literature such as H.G. Wells' War of the Worlds, as well as recent books and movies such as Andy Weir's The Martian. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is...

The Boxcar children investigate the disappearance of a student's research paper from an observatory and the subsequent disappearance of another student.