The majority view is that life began with replicating molecules, the precursors of modern genes. The minority belief is that random populations of molecules evolved metabolic activities before exact replication existed and that natural selection drove the evolution of cells toward greater complexity for a long time without the benefit of genes. Dyson analyzes both of these theories with reference to recent important discoveries by geologists and chemists, aiming to stimulate new experiments that could help decide which theory is correct. This second edition covers the impact revolutionary discoveries such as the existence of ribozymes, enzymes made of RNA; the likelihood that many of the most ancient creatures are thermophilic, living in hot environments; and evidence of life in the most ancient of all terrestrial rocks in Greenland have had on our ideas about how life began. It is a clearly written, fascinating book that will appeal to anyone interested in the origins of life.

    They distill more than 20 years of research and first-hand accounts from the most biodiverse ecosystems on Earth into straightforward principles and guidance for confronting our culture of hyper-novelty.For evolutionary biologists Heather Heying and Bret Weinstein, the cause of our woes is clear: the modern world is out of sync with our ancient brains and bodies. We evolved to live in clans, but today most people don't even know their neighbors' names. Differences between the sexes once served a necessary evolutionary purpose, but today many dismiss the concept of biological sex as offensive. The cognitive dissonance spawned by trying to live in a society we're not built for is killing us.

    This is a set of eighteen audio CDs and an accompanying softcover course guidebook.Contains parts 1 - 3 of the Thinking About Capitalism course.

    It was a time of backward-seeming notions, when almost everyone still accepted the biblical account of creation as the literal truth and authoritarianism as the most natural and viable social order. But by the time both men died, the world had changed: ordinary people understood that life on earth was a story of continuous evolution, and the Civil War had proved that a democracy could fight for principles and endure. And with these signal insights much else had changed besides. Together, Darwin and Lincoln had become midwives to the spirit of a new world, a new kind of hope and faith.""Searching for the men behind the icons of emancipation and evolution, Adam Gopnik shows us, in this captivating double life, Lincoln and Darwin as they really were: family men and social climbers; ambitious manipulators and courageous adventurers; the living husband, father, son, and student behind each myth. How do we reconcile Lincoln, the supremely good man we know, with the hardened commander who wittingly sent tens of thousands of young soldiers to certain death? Why did the relentlessly rational Darwin delay publishing his "Great Idea" for almost twenty years? How did inconsolable grief at the loss of a beloved child change each man? And what comfort could either find - for himself or for a society now possessed of a sadder, if wiser, understanding of our existence? Such human questions and their answers are the stuff of this book."Above all, we see Lincoln and Darwin as thinkers and writers - as makers and witnesses of the great change in thought that marks truly modern times: a hundred years after the Enlightenment, the old rule of faith and fear finally yielding to one of reason, argument, and observation not merely as intellectual ideals but as a way of life; the judgment of divinity at last submitting to the verdicts of history and time. Lincoln considering human history, Darwin reflecting on deep time - both reshaped our understanding of what life is and how it attains meaning. And they invented a new language to express that understanding.Angels and Ages is an original and personal account of the creation of the liberal voice - of the way we live now and the way we talk at home and in public. Showing that literary eloquence is essential to liberal civilization, Adam Gopnik reveals why our heroes should be possessed by the urgency of utterance, obsessed by the need to see for themselves, and endowed with the gift to speak for us all.

    Thus, the literature on speciation, as well as the number of researchers and students working in this area, has grown explosively. Despite thesedevelopments, there has been no book-length treatment of speciation in many years. As a result, both the seasoned scholar and the newcomer to evolutionary biology had no ready guide to the recent literature on speciation--a body of work that is enormous, scattered, and increasingly technical.Although several excellent symposium volumes have recently appeared, these collections do not provide a unified, critical, and up-to-date overview of the field. Speciation is designed to fill this gap.Aimed at professional biologists, graduate students, and advanced undergraduates, Speciation covers both plants and animals (the first book on this subject to do so), and deals with all relevant areas of research, including biogeography, field work, systematics, theory, and genetic and molecularstudies. It gives special emphasis to topics that are either controversial or the subject of active research, including sympatric speciation, reinforcement, the role of hybridization in speciation, the search for genes causing reproductive isolation, and mounting evidence for the role of natural andsexual selection in the origin of species. The authors do not hesitate to take stands on these and other controversial issues. This critical and scholarly book will be invaluable to researchers in evolutionary biology and is also ideal for a graduate-level course on speciation.

    Yet discoveries over the past fifty years have challenged these ideas, shedding new light on the extraordinary capabilities and complex interior lives of plants. In Brilliant Green, Stefano Mancuso, a leading scientist and founder of the field of plant neurobiology, presents a new paradigm in our understanding of the vegetal world. Combining a historical perspective with the latest in plant science, Mancuso argues that, due to cultural prejudices and human arrogance, we continue to underestimate plants. In fact, they process information, sleep, remember, and signal to one another -- showing that, far from passive machines, plants are intelligent and aware. Through a survey of plant capabilities from sight and touch to communication, Mancuso challenges our notion of intelligence, presenting a vision of plant life that is more sophisticated than most imagine. Plants have much to teach us, from network building to innovations in robotics and man-made materials -- but only if we understand more about how they live. Part botany lesson, part manifesto, Brilliant Green is an engaging and passionate examination of the inner workings of the plant kingdom. Financial support for the translation of this book has been provided by SEPS: Segretariato Europeo Per Le Pubblicazioni Scientifiche.

    But natural selection has given us a suite of beneficial social features, including our capacity for love, friendship, cooperation, and learning. Beneath all of our inventions -- our tools, farms, machines, cities, nations -- we carry with us innate proclivities to make a good society.In Blueprint, Nicholas A. Christakis introduces the compelling idea that our genes affect not only our bodies and behaviors, but also the ways in which we make societies, ones that are surprisingly similar worldwide.With many vivid examples -- including diverse historical and contemporary cultures, communities formed in the wake of shipwrecks, commune dwellers seeking utopia, online groups thrown together by design or involving artificially intelligent bots, and even the tender and complex social arrangements of elephants and dolphins that so resemble our own -- Christakis shows that, despite a human history replete with violence, we cannot escape our social blueprint for goodness.In a world of increasing political and economic polarization, it's tempting to ignore the positive role of our evolutionary past. But by exploring the ancient roots of goodness in civilization, Blueprint shows that our genes have shaped societies for our welfare and that, in a feedback loop stretching back many thousands of years, societies are still shaping our genes today.

    More than 2,500 years later, the issues they pondered continue to challenge, fascinate, and instruct us. Is reality stable and permanent or is it always changing? Are ethical values like justice and courage relative? Or are values "absolute"—simply and forever right and true? What is justice? What is happiness? How shall we best live our lives?An Introduction to Greek Philosophy beckons you to join this eternal discussion. For that is what this subject truly is: a conversation among thinkers that has continued through the centuries and remains accessible to us today. You find it constantly stimulating, sometimes controversial, and nearly always remarkably relevant.A Hunger for Reasons, not Myths or BeliefsProfessor David Roochnik has organized this series of 24 lectures as a "dialectical" approach (the word comes from the Greek dialegesthai: to converse). The philosophers are presented as if they were participating in a conversation. In this way, the course unfolds in a manner similar to the actual development of Greek philosophy.In this course, you study the development of Greek philosophy, meet its major thinkers, and explore the issues and ideas that concerned them. For example the first real philosophers were the Presocratics—literally, the philosophers who lived before Socrates. They included Thales of Miletus (585 B.C.E.–?), Anaximander (610–546), Anaximenes (approx. 550), Xenophanes (approx. 570) and Pythagoras (approx. 570–500).The Presocratics rejected myth and divine inspiration—such as had been embodied in the works of Homer and in Hesiod's creation story, the Theogony—as valid explanations of reality. Instead, they insisted that true understanding always requires a logos, a rational explanation (hence such English words as "psychology" and "biology").The Presocratics were concerned with issues such as identifying the arche or "Being": the thing that is the origin of all other things. They also introduced sophistic relativism, the notion that truth, goodness, and all other values were relative, depending entirely on the person or group that held them. This concept would become a major point of debate for the Greeks and for the ages.Are We Footnotes to Plato?The heroes of this course, and certainly of Greek philosophy, are Plato (429–347 B.C.E.) and his student, Aristotle (384–322 B.C.E.). Unlike the Presocratics, who wrote too little, Plato and Aristotle were prolific authors. Both argued against relativism and instead were staunch objectivists who believed that certain important values were absolutely and universally true. And both left a staggering mark on history.Alfred North Whitehead, the great 20th-century British philosopher, said, "The safest general characterization of the European philosophical tradition is that it consists of a series of footnotes to Plato." In the Middle Ages, Aristotle was held in such high esteem that he was simply known as "the philosopher."Among Plato's many contributions to philosophy is his ingenious device for the examination of ideas: his written dialogues. In them, Plato never uses his own voice. Instead, the dialogues take place among a changing cast of characters, and Socrates is the most notable among them. The effect is to invite us to take part in the conversation and, ultimately, to become philosophers.You study Plato's dialogues as well as his notion of the Forms. This was his response to relativism and proposed that every virtue and value has an absolute and perfect Form, which humans understand even before birth.Greek philosophy can be said to culminate with Aristotle, who wrote treatises on a breathtaking range of subjects. He is said to be the first to view knowledge as being divided into specific disciplines such as biology or astronomy. The university was later modeled on this approach. More than any other philosopher, Aristotle synthesized the views that preceded him.For Aristotle, one value was foremost and was contained in everything, from the tiniest organisms to the phenomena of fire to human beings: purpose. Everything has a purpose that can be recognized and objectively defined, and that gives meaning to life. You explore the details and rationale of Aristotle's teleological—or purposive—world-view, one of the most significant in history.An Invitation to ThinkIn this course, you not only learn about Greek philosophy but, to some extent, how to do it. Professor Roochnik emphasizes that Greek philosophy is ultimately not about facts or answers but about the give-and-take of ideas.By the end of these lectures, you will understand how Greek philosophy still heavily influences our view of life. We live today, Professor Roochnik maintains, at a time that is shaped by Presocratic, relativistic philosophy. Contemporary thinkers, and often the average person, have great difficulty finding objective truth or meaning in life.What have we lost in turning away from the world of Plato and Aristotle—a world where everything has a place and a purpose and life is saturated with value and meaning?On the other hand, what would we lose if we returned to that world?These are a few of the many questions that will give you ample food for thought. For the Greeks, that was the greatest feast of all.

    But amid the "dark" Middle Ages, the Abbasid Empire, which ruled the Middle East as well as much of Northern Africa and Central Asia from 750 to 1258, serves as a vitally important but often overlooked bridge between the ancient and modern worlds.The History and Achievements of the Islamic Golden Age is your opportunity to get to know the story and the accomplishments of this great period in human civilization. Taught by acclaimed lecturer Eamonn Gearon, these 24 remarkable lectures offer brilliant insights into an era too often overlooked by traditional history textbooks. You'll meet a wealth of scholars, scientists, poets, and philosophers who paved the way for the Renaissance and continue to affect our world in surprising ways.For instance, gain insights into:- The origins of the scientific method, along with the development of algebra, chemistry, physics, and astronomy as discrete fields of inquiry- The invention of the modern "teaching hospital" and a medical encyclopedia that served Europe for the next 600 years- The preservation and translation of the world's great literature, from the Hadith (or sayings of Muhammad) to the master works of Greece and Rome- Ontological philosophy that served future Jewish, Christian, and Muslim theologians concerned with the nature of God and the relationship between faith and reasonIt is nearly impossible to overstate the power and importance of this crucial 500-year history, headquartered in Baghdad but stretching around the world. While much of Europe was quietly passing the time, the Abbasid Empire was an international, multicultural hub of trade, travel, education, art, science, and much more.

    Soon enough, she is happily ensconced in the daily workings of his family. And not only that: Stella is treated like a family member—in ways that dogs of his youth were not. Spending humanlike sums on vet bills, questioning her diet and exercise regimens, contemplating her happiness—how had this all come to pass, when the dogs from Homans’s childhood seemed quite content living mostly out in the yard?In What’s a Dog For?, Homans explores the dog’s complex and prominent place in our world and how it came to be. Evolving from wild animals to working animals to nearly human members of our social fabric, dogs are now the subject of serious scientific studies concerning pet ownership, evolutionary theory, and even cognitive science. From new insights into what makes dogs so appealing to humans to the health benefits associated with owning a dog, Homans investigates why the human-canine relationship has evolved so rapidly—how dogs moved into our families, our homes, and sometimes even our beds in the span of a generation, becoming a $53 billion industry in the United States in the process.As dogs take their place as coddled family members and their numbers balloon to more than seventy-seven million in the United States alone, it’s no surprise that canine culture at large is also undergoing a massive transformation. They are now subject to many of the same questions of rights and ethics as people, and the politics of dogs are more tumultuous and public than ever— with fierce moral battles raging over kill shelters, puppy mills, and breed standards. Incorporating interviews and research from scientists, activists, breeders, and trainers, What’s a Dog For? investigates how dogs have reached this exalted status and why they hold such fascination for us. With one paw in the animal world and one paw in the human world, it turns out they have much to teach us about love, death, and morality—and ultimately, in their closeness and difference, about what it means to be human.

    Cave paintings of the giant beasts hint at the profound role they played in early human culture-our Ice Age ancestors built igloo-shaped huts out of mammoth bones and even feasted on mammoth tongues. Eager to uncover more clues to this mystical prehistoric age, explorers since the time of Peter the Great have scoured Siberia for mammoth remains. Now a new generation of explorers has taken to the tundra. Armed with GPS, ground-penetrating radar, and Soviet-era military helicopters, they seek an elusive prize: a mammoth carcass that will help determine how the creature lived, how it died-and how it might be brought back to life.In this adventure-filled narrative, science writer Richard Stone follows two teams of explorers-one Russian/Japanese, the other a French-led consortium-as they battle bitter cold, high winds, supply shortages, and the deeply rooted superstitions of indigenous peoples who fear the consequences of awakening the "rat beneath the ice." Stone travels from St. Petersburg to the Arctic Circle, from the North Sea to high-tech Japanese laboratories, as he traces the sometimes-surreal quest of these intrepid scientists, whose work could well rewrite our planet's evolutionary history. A riveting tale of high-stakes adventure and scientific hubris, Mammoth is also an intellectual voyage through uncharted moral terrain, as we confront the promise and peril of resurrecting creatures from the deep past.

    Conway Morris is one of the few paleontologists ever to explore the Burgess Shale, having been involved in the dig since 1972, and thus he is an ideal guide to this amazing discovery. Indeed, he provides a complete overview of this remarkable find, ranging from an informative, basic discussion of the origins of life and animals on earth, to a colorful description of Charles Walcott's discovery of the Burgess Shale and of the painstaking scientific work that went on there (as well as in Burgess collections held at Harvard and the Smithsonian), to an account of similar fossil finds in Greenland and in China. The heart of the book is an imaginative trip in a time machine, back to the Cambrian seas, where the reader sees first-hand the remarkable diversity of life as it existed then. And perhaps most important, Conway Morris examines the lessons to be learned from the Burgess Shale, especially as they apply to modern evolutionary thinking. In particular, he critiques the ideas of Stephen Jay Gould, whose best-selling book Wonderful Life drew on Conway Morris's Burgess Shale work. The author takes a fresh look at the evidence and draws quite different conclusions from Gould on the nature of evolution. This finely illustrated volume takes the reader to the forefront of paleontology as it provides fresh insights into the nature of evolution and of life on earth.

    Our instincts—for food, sex, or territorial protection— evolved for life on the savannahs 10,000 years ago, not in today’s world of densely populated cities, technological innovations, and pollution. We now have access to a glut of larger-than-life objects, from candy to pornography to atomic weapons—that gratify these gut instincts with often-dangerous results. Animal biologists coined the term “supernormal stimuli” to describe imitations that appeal to primitive instincts and exert a stronger pull than real things, such as soccer balls that geese prefer over eggs. Evolutionary psychologist Deirdre Barrett applies this concept to the alarming disconnect between human instinct and our created environment, demonstrating how supernormal stimuli are a major cause of today’s most pressing problems, including obesity and war. However, Barrett does more than show how unfettered instincts fuel dangerous excesses. She also reminds us that by exercising self-control we can rein them in, potentially saving ourselves and civilization. 55 illustrations.

    In this course, The Great Courses partners with the Smithsonian - one of the world's most storied and exceptional educational institutions - to examine the extraordinary events of this period and uncover the far-reaching impact of this incredible revolution. Over the course of 36 thought-provoking lectures, longtime Great Courses favorite Professor Allitt introduces you to the inventors, businessmen, and workers responsible for transforming virtually every aspect of our lives and fueling one of the greatest periods of innovation in human history. The technological achievements of this era are nothing short of astonishing. Thanks to inventions such as the steam engine and processes such as large-scale iron smelting, industrial entrepreneurs were able to mechanize labor, which allowed for a host of new efficiencies such as division of labor, mass production, and global distribution. You'll discover the science behind some of the most astounding inventions in modern history, including the spinning jenny, the incandescent light bulb, and the computer processor. You'll learn how these inventions came about and consider what effects these technologies had on every aspect of human life. Get an inside look at the history of industrial innovation and explore the lives of engineers, inventors, architects, and designers responsible for changing the world - as well as ordinary workers who lost their livelihoods to new technologies and suffered from unsafe working conditions. The story of the Industrial Revolution is complex, and these lectures will leave you with a new appreciation for the amazing human achievements all around us.

    But evolutionary biologists also point out many examples of contingency, cases where the tiniest change--a random mutation or an ancient butterfly sneeze--caused evolution to take a completely different course. What role does each force really play in the constantly changing natural world? Are the plants and animals that exist today, and we humans ourselves, inevitabilities or evolutionary freaks? And what does that say about life on other planets?Jonathan Losos reveals what the latest breakthroughs in evolutionary biology can tell us about one of the greatest ongoing debates in science. He takes us around the globe to meet the researchers who are solving the deepest mysteries of life on Earth through their work in experimental evolutionary science. Losos himself is one of the leaders in this exciting new field, and he illustrates how experiments with guppies, fruit flies, bacteria, foxes, and field mice, along with his own work with anole lizards on Caribbean islands, are rewinding the tape of life to reveal just how rapid and predictable evolution can be.Improbable Destinies will change the way we think and talk about evolution. Losos's insights into natural selection and evolutionary change have far-reaching applications for protecting ecosystems, securing our food supply, and fighting off harmful viruses and bacteria. This compelling narrative offers a new understanding of ourselves and our role in the natural world and the cosmos.