The early history of Earth covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead, paleontologists and scientists who study geochronology divide time into periods and eras. What humans commonly refer to as the “Ice Age” is actually a series of fluctuating climate events that have occurred throughout the planet’s history. These ongoing historical phenomena are difficult to conceptualize because of both the time frame involved and the natural process by which they cyclically unfold.

The early history of Earth covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead, paleontologists and scientists who study geochronology divide time into periods and eras. The current view of science is that Earth is around 4.6 billion years old, and the first four billion years of its development are known as the Precambrian period.

The early history of Earth covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead, paleontologists and scientists who study geochronology divide time into periods and eras. The current view of science is that Earth is around 4.6 billion years old, but despite all of the scientific advances made in the past few centuries, including an enhanced understanding of Earth’s geological past, relatively little is known about the planet’s early history.

Love them or hate them, guns are woven deeply into the American soul. Names like Colt, Smith & Wesson, Winchester, and Remington are legendary. Yet few people are aware of the roles these men played at a crucial time in United States history, from westward expansion in the 1840s, through the Civil War, and into the dawn of the Gilded Age. Through personal drive and fueled by bloodshed, they helped propel the young country into the forefront of the world's industrial powers. Their creations helped save a nation divided, while planting seeds that would divide the country again later.

The Pleistocene spans a period from around 2.5 million years ago (mya) to just over 12,000 years ago, and it was an epoch of enormous change on Earth, mainly characterized by climate changes involving fluctuations between periods of extreme heat and long periods of glaciation. This period is commonly known as the Ice Age, despite the fact there were actually a number of separate periods of cold. The Pleistocene Era: The History of the Ice Age and the Dawn of Modern Humans looks at the development of the era, what life on Earth was like, and the origins of archaic humans.

The history of warfare cannot be fully understood without considering the technology of killing. In Firepower, acclaimed historian Paul Lockhart tells the story of the evolution of weaponry and how it transformed not only the conduct of warfare, but also the very structure of power in the West, from the Renaissance to the dawn of the atomic era.

At the time of his tragic death in February 2013, former Navy SEAL Chris Kyle, the most accomplished sniper in U.S. military history, was finishing a remarkable book that retold American history through the lens of a hand-selected list of firearms. Kyle masterfully argues that guns have played a fascinating, indispensable, and often under-appreciated role in our national story. He carefully chose ten guns to help tell his story, ranging from the American long rifle to the modern M-16, and uses these guns as a platform for exploring American history.

The fascinating science and history of the air we breathe. It's invisible. It's ever present. Without it, you would die in minutes. And it has an epic story to tell. In Caesar's Last Breath, New York Times best-selling author Sam Kean takes us on a journey through the periodic table, around the globe, and across time to tell the story of the air we breathe, which, it turns out, is also the story of earth and our existence on it.

Whether you are a scientist or a poet, pro-nuclear energy or staunch opponent, conspiracy theorist or pragmatist, James Mahaffey's books have served to open up the world of nuclear science like never before. With clear explanations of some of the most complex scientific endeavors in history, Mahaffey's new book looks back at the atom's wild, secretive past and then toward its potentially bright future.

In this volume, Steven Johnson explores the history of innovation over centuries, tracing facets of modern life (refrigeration, clocks, and eyeglass lenses, to name a few) from their creation by hobbyists, amateurs, and entrepreneurs to their unintended historical consequences. Filled with surprising stories of accidental genius and brilliant mistakes - from the French publisher who invented the phonograph before Edison but forgot to include playback, to the Hollywood movie star who helped invent the technology behind Wi-Fi and Bluetooth.

Few people are aware that John Moses Browning - a tall, humble, cerebral man born in 1855 and raised as a Mormon in the American West - was the mind behind many of the world-changing firearms that dominated more than a century of conflict. He invented the design used in virtually all modern pistols, created the most popular hunting rifles and shotguns, and conceived the machine guns that proved decisive not just in World Wars I and II but nearly every major military action since. Yet few in America knew his name until he was into his 60s.

The New York Times best-selling author traces the development of technology from the Industrial Age to the Digital Age to explore the single component crucial to advancement - precision - in a superb history that is both an homage and a warning for our future.

From the moment radiation was discovered in the late nineteenth century, nuclear science has had a rich history of innovative scientific exploration and discovery, coupled with mistakes, accidents, and downright disasters.

Best-selling author Simon Winchester offers an enthralling biography of the Pacific Ocean and its role in the modern world, exploring our relationship with this imposing force of nature. Winchester's personal experience is vast and his storytelling second to none. And his historical understanding of the region is formidable, making Pacific a paean to this magnificent sea of beauty, myth, and imagination that is transforming our lives.

Regarded as one of the brightest young scientists of his generation, Lewis Dartnell proposes that the key to preserving civilization in an apocalyptic scenario is to provide a quickstart guide, adapted to cataclysmic circumstances. The Knowledge describes many of the modern technologies we employ, but first it explains the fundamentals upon which they are built. The Knowledge is a brilliantly original guide to the fundamentals of science and how it built our modern world as well as a thought experiment about the very idea of scientific knowledge itself.

Through an unforgettable cast of characters, Pulitzer Prize-winning author Richard Rhodes explains how wood gave way to coal and coal made room for oil, as we now turn to natural gas, nuclear power, and renewable energy. Rhodes looks back on five centuries of progress, through such influential figures as Queen Elizabeth I, King James I, Benjamin Franklin, Herman Melville, John D. Rockefeller, and Henry Ford.

Like the alphabet, the calendar, or the zodiac, the periodic table of the chemical elements has a permanent place in our imagination. But aside from the handful of common ones (iron, carbon, copper, gold), the elements themselves remain wrapped in mystery. We do not know what most of them look like, how they exist in nature, how they got their names, or of what use they are to us.

Popular Lost Cities author David Hatcher Childress takes us into the amazing world of ancient technology, from computers in antiquity to the flying machines of the gods. Childress looks at the technology that was allegedly used in Atlantis and the theory that the Great Pyramid of Egypt was originally a gigantic power station. He examines tales of ancient flight and the technology that it involved; how the ancients used electricity; megalithic building techniques; the use of crystal lenses and the fire from the gods; and more.

The New York Times best-selling author traces the development of technology from the Industrial Age to the Digital Age to explore the single component crucial to advancement - precision - in a superb history that is both an homage and a warning for our future.

Award-winning author William Rosen tells the story of the men responsible for the Industrial Revolution and the machine that drove it: the steam engine.

In the 30 years after the Civil War, the United States blew by Great Britain to become the greatest economic power in world history. That is a well-known period in history, when titans like Andrew Carnegie, John D. Rockefeller, and J. P. Morgan walked the earth. But as Charles R. Morris shows us, the platform for that spectacular growth spurt was built in the first half of the century. By the 1820s, America was already the world's most productive manufacturer and the most intensely commercialized society in history.

A compilation of diverse topics across our 12 categories. You will learn about: the history of whaling, the art of film noir, the psychology behind the Stockholm Syndrome, the history of the U.S. Federal Reserve, the story of Joan of Arc, the discovery of penicillin, the science of meteorites, the history of the D-Day Invasion, the unexplained phenomenon of crop circles, the adventure of climbing Everest, the thought of Confucius, and the start of fireworks.

Regarded as one of the brightest young scientists of his generation, Lewis Dartnell proposes that the key to preserving civilization in an apocalyptic scenario is to provide a quickstart guide, adapted to cataclysmic circumstances. The Knowledge describes many of the modern technologies we employ, but first it explains the fundamentals upon which they are built. The Knowledge is a brilliantly original guide to the fundamentals of science and how it built our modern world as well as a thought experiment about the very idea of scientific knowledge itself.

On the night of February 17, 1864, the tiny Confederate submarine HL Hunley made its way toward the USS Housatonic just outside Charleston harbor. Within a matter of hours, the Union ship’s stern was blown open in a spray of wood planks. The explosion sank the ship, killing many of its crew. And the submarine, the first ever to be successful in combat, disappeared without a trace. For 131 years the eight-man crew of the HL Hunley lay in their watery graves, undiscovered.

Uranium is a common element in the earth's crust and the only naturally occurring mineral with the power to end all life on the planet. After World War II, it reshaped the global order---whoever could master uranium could master the world. Marie Curie gave us hope that uranium would be a miracle panacea, but the Manhattan Project gave us reason to believe that civilization would end with apocalypse.

For America, the gun is a story of innovation, power, violence, character, and freedom. From the founding of the nation to the pioneering of the West, from the freeing of the slaves to the urbanization of the 20th century, our country has had a complex and lasting relationship with firearms. Now, in First Freedom, nationally syndicated columnist and veteran writer David Harsanyi explores the ways in which firearms have helped preserve our religious, economic, and cultural institutions for more than two centuries.

Firebrand conservative columnist, commentator, Internet entrepreneur, and number-one New York Times best-selling author Michelle Malkin tells the fascinating, little-known stories of the inventors who have contributed to American exceptionalism and technological progress.

Few people are aware that John Moses Browning - a tall, humble, cerebral man born in 1855 and raised as a Mormon in the American West - was the mind behind many of the world-changing firearms that dominated more than a century of conflict. He invented the design used in virtually all modern pistols, created the most popular hunting rifles and shotguns, and conceived the machine guns that proved decisive not just in World Wars I and II but nearly every major military action since. Yet few in America knew his name until he was into his 60s.

Brunelleschi's Dome is the story of how a Renaissance genius bent men, materials, and the very forces of nature to build an architectural wonder we continue to marvel at today. Denounced at first as a madman, Brunelleschi was celebrated at the end as a genius. He engineered the perfect placement of brick and stone, built ingenious hoists and cranes to carry an estimated 70 million pounds hundreds of feet into the air, and designed the workers' platforms and routines so carefully that only one man died during the decades of construction.

The Age of Railways was an era of extraordinary change which utterly transformed every aspect of British life - from trade and transportation to health and recreation. Full Steam Ahead reveals how the world we live in today was entirely shaped by the rail network, charting the glorious evolution of rail transportation and how it left its mark on every aspect of life, landscape and culture. Peter Ginn and Ruth Goodman brilliantly bring this revolution to life in their trademark style, which engages and captivates.