And this updated edition contains a host of new findings on “Gemstones for Collectors,” additional gems in the “Table of Constants,” and the “double fraction” figures that experts have long wanted—a very special new feature.All the gemstones are treated in their many variations: more than 1,500 full-color photos showcase each precious and semiprecious stone in both its rough, natural, and its polished and cut renditions. Each entry offers complete information on the gemstone’s formation, structure, physical properties, and characteristics, along with the best methods of working, cutting, and polishing it. There are even full treatments of lesser-known gems, from andalusite to vesuvian, and a special section is devoted to rocks as precious stones, including alabaster, onyx, obsidian, and fossils. Organic gem materials are also covered, such as coral, ivory, amber, and pearl. Charts and tables help collectors identify unknown gemstones and check for genuineness.

    

    Using documents that convey Cherokee voices, government policy, and white citizens’ views, Theda Perdue and Michael D. Green present a multifaceted account of this complicated moment in American history. The second edition of this successful, class-tested volume contains four new sources, including the Cherokee Constitution of 1827 and a modern Cherokee’s perspective on the removal. The introduction provides students with succinct historical background. Document headnotes contextualize the selections and draw attention to historical methodology. To aid students’ investigation of this compelling topic, suggestions for further reading, photographs, and a chronology of the Cherokee removal are also included.

    Told by a geologist with a novelist's sense of language and narrative, Sand examines the science—sand forensics, the physics of granular materials, sedimentology, paleontology and archaeology, planetary exploration—and at the same time explores the rich human context of sand. Interwoven with tales of artists, mathematicians, explorers, and even a vampire, the story of sand is an epic of environmental construction and destruction, an adventure in staggering scales of time and distance, yet a tale that encompasses the ordinary and everyday. Sand, in fact, is all around us—it has made possible our computers, buildings and windows, toothpaste, cosmetics, and paper, and it has played dramatic roles in human history, commerce, and imagination. In this luminous, kinetic, revelatory account, we do indeed find the world in a grain of sand.

    Then came the murder on Tioga Way, where a dark trail of blood led from the front door to the victim's bedroom. For this killer, death was only the first step. Here was someone who had to desecrate the bodies of his victims, someone who would surely keep slaughtering until he was stopped.California's most monstrous case of serial killing had begun.Soon five people were dead and a two-year-old boy was missing. Calls from panic-stricken residents were rolling into police headquarters. And somewhere a maniac was hiding, his blood thirst mounting ...As told by Lt. Ray Biondi, the homicide detective who led the investigation, here is the true story of murderer Richard Chase and the all-out effort to stop him. From bullet casings to containers filled with blood, from eyewitness accounts to the one crucial piece of evidence that finally turned the case around, here is what it was like to match wits with a psychotic killer - a man so depraved he drank his victims' blood ...

    The only question is when. In the meantime, we need to get much better at finding objects hurtling our way, and if they’re large enough to penetrate the atmosphere without burning up, figure out what to do about them. We owe many of science’s most important discoveries to the famed Meteor Crater, a mile-wide dimple on the Colorado Plateau created by an asteroid hit 50,000 years ago. In his masterfully researched Fire in the Sky, Dillow unpacks what the Crater has to tell us. Prior to the early 1900s, the world believed that all craters—on the Earth and Moon—were formed by volcanic activity. Not so. The revelation that Meteor Crater and others like it were formed by impacts with space objects has led to a now accepted theory about what killed off the dinosaurs, and it has opened up a new field of asteroid observation, which has recently brimmed with urgency. Dillow looks at great asteroid hits of the past and spends time with modern-day asteroid hunters and defense planning experts, including America’s first Planetary Defense Officer. Satellite sensors confirm that a Hiroshima-scale blast occurs in the atmosphere every year, and a smaller, one-kiloton blast every month. While Dillow makes clear that the objects above can be deadly, he consistently inspires awe with his descriptions of their size, makeup, and origins. At once a riveting work of popular science and a warning to not take for granted the space objects hurtling overhead, Fire in the Sky is, above all, a testament to our universe’s celestial wonders.

    In 1969 we even walked on the moon. And yet as late as 2000, the earth’s deepest cave—the supercave—remained undiscovered. This is the story of the men and women who risked everything to find it, earning their place in history beside the likes of Peary, Amundsen, Hillary, and Armstrong. In 2004, two great scientist-explorers are attempting to find the bottom of the world. Bold, heroic American Bill Stone is committed to the vast Cheve Cave, located in southern Mexico and deadly even by supercave standards. On the other side of the globe, legendary Ukrainian explorer Alexander Klimchouk—Stone’s polar opposite in temperament and style, but every bit his equal in scientific expertise, physical bravery, and sheer determination—has targeted Krubera, a freezing nightmare of a supercave in the Republic of Georgia, where underground dangers are compounded by the horrors of separatist war in this former Soviet republic.

    

    Desperation drives quiet schoolteacher Clare Morgan to ask the Demon Earl to help save her village. Unwilling to involve himself in the problems of others, Nicholas agrees --- only if Clare will live with him for three months.

    Now palaeontologist Charles Pellegrino presents a wealth of new knowledge about the doomed towns – and brings to vivid life the people, their last moments, and the aftermath.The lessons learned from modern scrutiny of that ancient eruption produce disturbing echoes in the present. Dr Pellegrino, who worked at Ground Zero in the aftermath of the 9/11 attack, shares his unique knowledge of the strange physics of volcanic 'downblast' and 'collapse column', drawing a direct link from past to present, and providing readers with a poignant glimpse into the last moments of the 'American Vesuvius'.

    In 1993, at Volcán Galeras, the death toll was smaller but no less tragic: despite seismic data that foretold possible disaster, an expedition of international scientists proceeded into the volcano. Two hours later, nine people were dead.Expertly detailing the turbulent history of Colombia, Victoria Bruce links together the stories of the heroes, villains, survivors, and victims of these two events. No Apparent Danger is a spellbinding account of clashing cultures and the life-and-death consequences of scientific arrogance.

    In a small Missouri town during the 1920s, Clem is torn between family responsibility and the life he wishes to lead when he must begin working in the local lead mine on his thirteenth birthday, to help pay for his sisters medical care.

    Yet the man behind what became "America's attic," James Smithson, has remained a shadowy figure for more than 150 years.Drawing on unpublished diaries and letters from across Europe and the United States, historian Heather Ewing tells his compelling story in full. The illegitimate son of the Duke of Northumberland, Smithson was the youngest member of Britain's Royal Society and a talented chemist admired by the greatest scientists of his age. At the same time, however, he was also a suspected spy, an inveterate gambler, and a radical revolutionary during the turbulent years of the Napoleonic Wars. But at the heart of Smithson's story is his bequest—worth $9 million in today in today's currency—which sparked an international lawsuit and a decade-long congressional battle, featuring a dizzying cast of historical figures, including John Quincy Adams, and Alexander Graham Bell, both of whom grappled with how—and even whether—to put Smithson's endowment to use.Fascinating and magisterial, Ewing's biography presents a sweeping portrait of a remarkable man at the center of the English Enlightenment and the creation of America's greatest museum.

    Map of a Nation tells the story of the creation of the Ordnance Survey map - the first complete, accurate, affordable map of the British Isles.

    Africa has been coveted for its rich natural resources ever since the era of the Pharaohs. In past centuries, it was the lure of gold, ivory, and slaves that drew merchant-adventurers and conquerors from afar. In modern times, the focus of attention is on oil, diamonds, and other rare earth minerals. In this vast and vivid panorama of history, Martin Meredith follows the fortunes of Africa over a period of 5,000 years. With compelling narrative, he traces the rise and fall of ancient kingdoms and empires; the spread of Christianity and Islam; the enduring quest for gold and other riches; the exploits of explorers and missionaries; and the impact of European colonization. He examines, too, the fate of modern African states and concludes with a glimpse of their future. His cast of characters includes religious leaders, mining magnates, warlords, dictators, and many other legendary figures-among them Mansa Musa, ruler of the medieval Mali empire, said to be the richest man the world has ever known.