For thousands of years, people pictured the sky as a giant dome surrounding the Earth. The stars were thought to be fixed to this dome, which slowly turned above us, much like the motion of the Sun, the Moon and the planets. This book tells the story of the scientific revolution that changed that picture forever—the moment humanity realized that the motions we see in the sky are only apparent motions, created by the Earth spinning on its axis and traveling around the Sun. The “celestial dome,” it turned out, was an illusion. It is the Earth—and the heavens—that move. This revolution began with Nicolaus Copernicus’s book On the Revolutions of the Heavenly Spheres , published in 1543, just as the author was nearing the end of his life. The bold ideas in that book sent shockwaves through the scientific world and helped lay the foundations of modern physics. They also transformed the way people thought about nature—and about humanity’s place in the universe. This book follows the dramatic story of the Copernican Revolution and the long struggle to convince the world of its truth, from Galileo’s telescopic discoveries—made with a telescope he built himself—to the fierce scientific and religious debates that followed. The Copernican Revolution opened the door to an even bigger idea: The universe is vast, stretching far beyond our solar system. The “fixed stars,” we learned, are actually distant suns, so far away that they appear as tiny points of light. From there, it was only natural to wonder whether some of those stars might have planets of their own. At the end of the twentieth century—more than 400 years after Copernicus—astronomers finally discovered that planets are everywhere, orbiting stars across the galaxy. And who knows—perhaps some of those distant worlds may even host life.

Over the past two decades, advanced technologies and space missions have completely transformed our understanding of potential life beyond Earth. The resulting field, astrobiology, has become a multidisciplinary scientific discipline, encompassing many of the natural sciences and having implications for many areas of research. This book presents an introduction and overview of astrobiology. It deals with a wide range of fields, from the search for signs of life on planets in our solar system, to the discovery of exoplanets in distant solar systems and assessing the potential for life there. The book is based on the course of the same name that the author taught for more than two decades at the Hebrew University, and the course recorded on YouTube in the Cornerstones program , which has accumulated tens of thousands of views. The book is accessible not only to students of natural sciences, but to any reader who wants to learn about and understand the fascinating possibilities of life on other worlds.

Prof. Heinrich Mendelssohn was a young student of medicine and zoology in Berlin, where he was born in 1910. When the Nazis came to power, he immigrated to Israel with his family, completed his studies at the Hebrew University in Jerusalem, where he also wrote his doctoral thesis in zoology. Mendelssohn invested great efforts to expand zoological knowledge in Israel, and later became the director of the Zoological Institute, one of the cornerstones of Tel Aviv University. He served as vice president of the university and dean of the Faculty of Natural Sciences. His extensive research earned him the title of "the father of zoology" in Israel and one of the founding fathers of the field of nature conservation. From the beginning of his studies at the Hebrew University of Jerusalem, Mendelssohn kept a journal in which he recorded his observations of flora and fauna throughout the country and neighboring countries. The Journal was recorded in many notebooks from the year of his immigration, 1933, until 1958. He made many drawings of birds and other animals. In his wonderful drawings, he "captured" the character of the subjects and their behavior in a unique way. Many of them accompany the pages of this book. The journals are a document of enormous importance for the study of nature in our country, a basis and source of information that provides contemporary researchers with the possibility of understanding and researching many processes that have occurred since then and to the present day. Those who peruse the book will learn a lot about Mendelssohn's path and will be able to learn firsthand about the character of our rich animal world in the first half of the twentieth century.

In this book Yoram Yom-Tov summarizes sixty years of observations and research on animals around the world, and takes readers on a fascinating journey into the wonders of the animal world — a journey intertwined with the life story of a curious, nature-loving boy who became a renowned researcher. Through the eyes of the researcher, the beauty and complexity of nature are revealed, exposing three key insights: nature is dynamic and constantly changing; every living creature is in constant interaction with its biological and physical environment, which creates a complex web of interactions; and the adaptations that animals have developed to their environment during evolution are evidence of unparalleled refinement and sophistication. These insights emerge from research conducted by Prof. Yom-Tov around the world throughout his long academic career in collaboration with colleagues, students, and even family members. They illustrate how scientific research not only expands human knowledge, but also encourages inspiration, appreciation, and even admiration for the great wonder that is nature.

A Ramble in the Hive is an eco-philosophical text that deals with the relationship between humans and honeybees from the dawn of humanity to the present day, interlinking mythology, folklore, literature, art and science from different historical periods. A Ramble in the Hive works as both popular science and philosophy, combining a study of the history of beekeeping and its multitude of inventions, with a philosophical and poetic view of the human encounter with honeybees as reflected in the imagination of our culture. It suggests approaching the hive as an archetype of living mythology that works on our collective imagination. A Ramble in the Hive presents the planetary honeybee crisis as a fascinating window through which to observe wide-ranging ecological issues. How did the honeybee get such a lofty and critical role – holding responsibility for both the future of humanity and the earth? What do the bees tell us in their current state? This book is an attempt to answer these questions.

In the 1940s, Erwin Schrödinger attempted to tackle the eternal question "What is Life?" from the perspective of the "naïve physicist." The result is this short book, which has influenced generations of scientists, sparked much controversy and become a classic. What Is Life? appears in Hebrew for the first time, accompanied by an epilogue by Prof. Avshalom Elitzur, who demonstrates to what extent Schrödinger's insights are relevant eighty years after the first publication of the essay.

Korot publishes original articles related to medical history covering medicine in Jewish and Hebrew sources, the history of Jewish physicians, medicine in Palestine and Israel and medicine during the Nazi era. There are shorter historical notes on these topics, book reviews and comments on important developments in medical history. Articles are mainly in English but with a significant Hebrew section.

Dan Perry was born and raised on Mount Carmel. From childhood, encouraged by his father, he often wandered on the mountain, getting to know its surroundings and connecting with its flora and fauna. As an adult, he became involved in the newly formed Nature Conservation Authority - first as a tour guide, and later as part of the Society for the Protection of Nature. In 1965 he started working within the Nature Conservation Authority, established in 1964, as an inspector in the Galilee as part of a collaboration between the Society and the Authority. Immediately after the Six-Day War, he established a magnificent system of nature reserves on the Golan Heights. He ran the Hermon Development Authority which established the Hermon site, and then joined the Authority's management and held a variety of positions. This unique volume includes color photographs.

Atlas of East Galilee Caves is published in a challenging period for the Upper Galilee, with hopes for a swift return to routine in this beautiful and region, bountiful with caves. The Atlas is published following studies and surveys conducted over the past decades. The boundaries of the area defined in the Atlas are the Hula Valley in the east, the border of Lebanon in the north and northwest, the sources of the streams flowing eastward in the west and the Issachar highlands in the south. The Atlas presents the basic data of the caves, and contains a concise multidisciplinary overview of what is known about them from a geological, historical, archaeological and biological point of view. The data is accompanied by plans and illustrations that expand the overall picture of each cave.

In the second half of the twentieth century, the medical community adopted the scientific method as a basis for practice. It seemed that after thousands of years the way was paved for a regulated process: from the laboratory through the clinical trial to the patient's bed. But it soon became clear that the road is neither straight nor continuous. Clinical research only offers unequivocal answers in a few cases. The balance between benefit and risk does not end with a statistical calculation; A significant part of the consideration of the factors that determine the change of medical practice is based on values, worldview and interests. Many factors are involved in the path leading from the laboratory to the patient: scientists, doctors, pharmaceutical and technology companies, politicians, regulators, and at the end of the path stand the patients themselves. Each of these factors uses the means at its disposal to influence the final result - the diagnosis, treatment and follow-up of the patient. The path of progress from the laboratory to the patient is also not continuous: sometimes the intervals between steps are large, sometimes sudden jumps occur after a prolonged period of slowing down and even stopping. Scientific and clinical research depends on the initiative, skills and determination of the researchers, and not a little on coincidences and has no fixed timetables. This book is dedicated to revealing the evolution of medical practice, to identifying fundamental changes in practice and to describing the winding way in which they were accepted and assimilated into the body of medical knowledge and the mutual relationship between the doctor and the patient.

The migration of birds is a fascinating phenomenon that has aroused curiosity since ancient times. This book brings to the interested reader the latest knowledge collected on this phenomenon by many researchers - scientists and enthusiasts, in Israel and around the world, and also presents the importance of the Land of Israel as a major traffic route for birds that migrate from Europe and Asia to Africa and back again. Recognizing this importance also has implications for preserving nature in the country.

The book deals with geomorphological and soil aspects, plants, and animals (arthropods, reptiles, and rodents) of dunes on the coastal plain of Israel. The book has 11 chapters: structure and geomorphological processes of coastal dunes, soil formation processes, the characteristic of the largest coastal dune areas, flora and fauna (arthropods, reptiles, small mammals: rodents), the impact of man and climate changes on coastal dune ecosystems, ecological-economic losses due to the loss or fixation of coastal dunes, policy, planning, and conflicts between stakeholders, conservation and interface of coastal dunes. The book is a product of the vast knowledge accumulated over decades in detailed studies conducted by Prof. Pua Bar, together with many other researchers in the coastal dunes in Israel.