Its organization and tactics were highly advanced and were unequaled until the modern era. Spectacular monuments to its perseverance and engineering skill are still visible today, most notably Hadrian’s Wall and the siegeworks around the fortress of Masada.This book is the first to examine in detail not just the early imperial army but also the citizens’ militia of the Republic and the army of the later Empire. The unprecedented scope and longevity of Roman military success is placed in the context of ordinary soldiers’ daily lives, whether spent in the quiet routine of a peaceful garrison or in arduous campaign and violent combat. Key battles and tactics are described, and there are brief biographies of the great commanders.Drawing on archaeology, ancient art, and original documentary sources, this book presents the most convincing history ever published of the Roman army.

    Bridging the chasm between educational and social history, this book was one of the first to examine developments in higher education in the context of the social, economic, and political forces that were shaping the nation at large.Surveying higher education from the colonial era through the mid-twentieth century, Rudolph explores a multitude of issues from the financing of institutions and the development of curriculum to the education of women and blacks, the rise of college athletics, and the complexities of student life. In his foreword to this new edition, John Thelin assesses the impact that Rudolph's work has had on higher education studies. The new edition also includes a bibliographic essay by Thelin covering significant works in the field that have appeared since the publication of the first edition.At a time when our educational system as a whole is under intense scrutiny, Rudolph's seminal work offers an important historical perspective on the development of higher education in the United States.

    Examining navigation and shipbuilding; cultural analogies between Native Americans and Africans; the transportation of plants, animals, and textiles between the continents; and the diaries, journals, and oral accounts of the explorers themselves, Ivan Van Sertima builds a pyramid of evidence to support his claim of an African presence in the New World centuries before Columbus. Combining impressive scholarship with a novelist’s gift for storytelling, Van Sertima re-creates some of the most powerful scenes of human history: the launching of the great ships of Mali in 1310 (two hundred master boats and two hundred supply boats), the sea expedition of the Mandingo king in 1311, and many others. In They Came Before Columbus, we see clearly the unmistakable face and handprint of black Africans in pre-Columbian America, and their overwhelming impact on the civilizations they encountered.

    The key feature of this classic title is the section of star charts that are cherished by backyard astronomers everywhere. Each new edition has outsold the previous one because of thorough revisions and additional new material.NightWatch has been acclaimed as the best general interest introduction to astronomy. The fourth edition has improvements over the 3rd edition in every chapter, including:The famous charts, ideal for stargazers using a small telescope or binoculars A complete update of the equipment section, including computerized telescopes An enlarged photography section, including how-to instructions for using the new generation of digital cameras for astronomical photography, both with and without a telescope The tables of future solar and lunar eclipses, planetary conjunctions and planet locations, updated through 2025. This edition includes star charts for use in the southern hemisphere. There are also dozens of new photographs throughout the book that show the latest thrilling discoveries made by current space observatories and probes.

    Drawing on cutting-edge science, they begin at the limits of the observable universe, a scale spanning 10^27 meters--about 93 billion light-years. And they end in the subatomic realm, at 10^-35 meters, where the fabric of space-time itself confounds all known rules of physics. In between are galaxies, stars and planets, oceans and continents, plants and animals, microorganisms, atoms, and much, much more. Stops along the way--all enlivened by Scharf's sparkling prose and his original insights into the nature of our universe--include the brilliant core of the Milky Way, the surface of a rogue planet, the back of an elephant, and a sea of jostling quarks.The Zoomable Universe is packed with more than 100 original illustrations and infographics that will captivate readers of every age. It is a whimsical celebration of discovery, a testament to our astounding ability to see beyond our own vantage point and chart a course from the farthest reaches of the cosmos to its subatomic depths--in short, a must-have for the shelves of all explorers.

    Jerry Toner shows what can be learnt from new approaches to ancient history, from analysing the bones of the dead in Pompeii or assessing the impact of environmental change, and considers how we can discover what it was like to live back then. He looks at every period, not just classical Athens and Republican Rome, but the Hellenistic kingdoms that followed Alexander and the Christian-dominated later Roman Empire. Greece and Rome, he argues, must be fitted into the global history of their day: what did Persians think of Greeks and how does the Roman empire stack up to China's?With vivid examples and animation from award-winning Cognitive at every stage, this is the ideal introduction to the ancient world for general readers and students.

    "One of today's best popularizers of science." —Kirkus Reviews.Loyal readers of the monthly "Universe" essays in Natural History magazine have long recognized Neil deGrasse Tyson's talent for guiding them through the mysteries of the cosmos with stunning clarity and almost childlike enthusiasm. Here, Tyson compiles his favorite essays across a myriad of cosmic topics. The title essay introduces readers to the physics of black holes by explaining the gory details of what would happen to your body if you fell into one. "Holy Wars" examines the needless friction between science and religion in the context of historical conflicts. "The Search for Life in the Universe" explores astral life from the frontiers of astrobiology. And "Hollywood Nights" assails the movie industry's feeble efforts to get its night skies right. Known for his ability to blend content, accessibility, and humor, Tyson is a natural teacher who simplifies some of the most complex concepts in astrophysics while simultaneously sharing his infectious excitement about our universe.

    Enjoy a thrilling intergalactic tour as Andrew Thomas redefines the force of gravity and introduces a brave new view of the universe!

    Unlike other texts, it begins with a detailed picture of the atom then builds toward chemistry's frontier, continually demonstrating how to solve problems, think about nature and matter, and visualize chemical concepts in the same ways as working chemists. The new edition incorporates features that extend the book's emphasis on modern techniques and applications while strengthening its problem solving approach. Atkins/Jones is the only book for this course featuring integrated book specific media that provides students with effective study help via a variety of electronic tools. The website at http: //www.whfreeman.com/chemicalprinciples3e has been developed simultaneously with the text and offers a range of tools for problem solving and chemical exploration

     During fourteen years, from 1955 to 1969, the Soviet Union and the United States of America were engaged in a dramatic race against each other to conquer space. This period encompassed dramatic victories, humbling defeats, and more than one tragedy. This is a story of human courage and ingenuity at its best and political maneuvering at its worst, of almost unbelievable technological progress undertaken with the object not just of advancing human knowledge but also of proving the superiority of one country over another. Inside you will read about... ✓ From Missiles to Rockets ✓ Russia Takes the Lead ✓ Early American Failures ✓ The First Men in Space ✓ Fatalities on Both Sides ✓ The Moon Landing And much more! The space race culminated in man setting foot upon the moon, but each milestone on the way to that final goal was bitterly contested. Two powerful nations pledged a substantial part of their national resources to beat the other in a scientific and technological race to be the first to achieve new records. In terms of contests between major powers, there has never been anything quite as dramatic, public, and sustained as the space race; it remains one of the most fascinating and engaging episodes of the Cold War.

    He constructs the story like a detective novel, putting pieces of clues together to form the whole puzzle and he makes an incredibly exciting job of it. He writes for the lay reader but he is far from condescening. His language is a joy to read. I agree with BlairBurton that the book is wildly entertaining but I resented his reference to the author as 'the premier theorist of crackpot science.' Velikovsy's 'crackpot' theories are yet to be disproved and his predictions have the uncanny habit of being proved right so that the world of the scientific community is as shaky as the description of the earth in "Worlds In Collision!" Readers will find great rewards in reading all of his works and judging for themselves. While "Oedipus and Akhnaton" is the least 'scientific' of his works it is no less fascinating and eminently readable.

    150 and c. 750, came to differ from "Classical civilization."These centuries, as the author demonstrates, were the era in which the most deeply rooted of ancient institutions disappeared for all time. By 476 the Roman empire had vanished from western Europe; by 655 the Persian empire had vanished from the Near East.Peter Brown, Professor of History at Princeton University, examines these changes and men's reactions to them, but his account shows that the period was also one of outstanding new beginnings and defines the far-reaching impact both of Christianity on Europe and of Islam on the Near East. The result is a lucid answer to a crucial question in world history; how the exceptionally homogeneous Mediterranean world of c. 200 became divided into the three mutually estranged societies of the Middle Ages: Catholic Western Europe, Byzantium and Islam. We still live with the results of these contrasts.

    --Carlo Rovelli, author of Seven Brief Lessons on Physics and Helgoland You've got questions: about space, time, gravity, and the odds of meeting your older self inside a wormhole. All the answers you need are right here.As a species, we may not agree on much, but one thing brings us all together: a need to know. We all wonder, and deep down we all have the same big questions. Why can't I travel back in time? Where did the universe come from? What's inside a black hole? Can I rearrange the particles in my cat and turn it into a dog?Researcher-turned-cartoonist Jorge Cham and physics professor Daniel Whiteson are experts at explaining science in ways we can all understand, in their books and on their popular podcast, Daniel and Jorge Explain the Universe. With their signature blend of humor and oh-now-I-get-it clarity, Jorge and Daniel offer short, accessible, and lighthearted answers to some of the most common, most outrageous, and most profound questions about the universe they've received.This witty, entertaining, and fully illustrated book is an essential troubleshooting guide for the perplexing aspects of reality, big and small, from the invisible particles that make up your body to the identical version of you currently reading this exact sentence in the corner of some other galaxy. If the universe came with an FAQ, this would be it.

    A meld of history and science, this book is a group portrait of some of the greatest minds who ever lived as they wrestled with nature’s most sweeping mysteries. The answers they uncovered still hold the key to how we understand the world.At the end of the seventeenth century—an age of religious wars, plague, and the Great Fire of London—when most people saw the world as falling apart, these earliest scientists saw a world of perfect order. They declared that, chaotic as it looked, the universe was in fact as intricate and perfectly regulated as a clock. This was the tail end of Shakespeare’s century, when the natural land the supernatural still twined around each other. Disease was a punishment ordained by God, astronomy had not yet broken free from astrology, and the sky was filled with omens. It was a time when little was known and everything was new. These brilliant, ambitious, curious men believed in angels, alchemy, and the devil, and they also believed that the universe followed precise, mathematical laws—-a contradiction that tormented them and changed the course of history.The Clockwork Universe is the fascinating and compelling story of the bewildered geniuses of the Royal Society, the men who made the modern world.

    But there remains a critical gap in our knowledge: we still know very little about what happened in the first seconds after the Big Bang. At the Edge of Time focuses on what we have recently learned and are still striving to understand about this most essential and mysterious period of time at the beginning of cosmic history.Delving into the remarkable science of cosmology, Dan Hooper describes many of the extraordinary and perplexing questions that scientists are asking about the origin and nature of our world. Hooper examines how we are using the Large Hadron Collider and other experiments to re-create the conditions of the Big Bang and test promising theories for how and why our universe came to contain so much matter and so little antimatter. We may be poised to finally discover how dark matter was formed during our universe's first moments, and, with new telescopes, we are also lifting the veil on the era of cosmic inflation, which led to the creation of our world as we know it.Wrestling with the mysteries surrounding the initial moments that followed the Big Bang, At the Edge of Time presents an accessible investigation of our universe and its origin.