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.

If a large rock had collapsed in a desert or a tree had fallen in the heart of a distant forest several hundred miles away from living beings, would it have made a sound upon its fall? Different people will give different answers to this ancient question. Objectively, some will say that a sound would have been heard because sound does not exist only in the mind of the listener. Subjectively, some would say that a sound requires someone to listen to it. What is correct? Is this complex answer related to the essence of sound? It's All in the Sound investigates the phenomenon of sound and tries to understand it and answer, among other things, the above questions. It was written to meet the needs of students and teachers, with a desire to update the teaching of physics and fill the shortage of textbooks in this field, which is associated with teaching the subject of sound waves. The gradual development of the concept of sound is discussed in the book by building structured experimental illustrations, as well as mathematical expressions describing this miraculous phenomenon. The illustrations were chosen so that a curious reader could repeat most of the experiments in a home environment without the need for special laboratory equipment. Even for readers unfamiliar with the basics of physical mathematics that describe sound, this book may provide a unique experience and open up a new window to understanding physics.

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.

In 1905, Albert Einstein astounded the scientific world when he proposed a theory that would become known as the special theory of relativity. Einstein's theory revolutionized the fundamental concepts of time and space, demonstrated the equivalence between mass and energy, and completely changed the face of modern physics. Despite its enormous importance, the theory of special relativity has remained largely unknown to the public interested in the scientific revolutions of the twentieth century. This book presents the theory of special relativity in a way that any student of the natural sciences can understand the theory itself, the crisis that led to its emergence, and its dramatic impact on the world of science. The book takes the reader on a fascinating, yet entertaining, journey of discovery and understanding of the theory of special relativity.

Einstein’s revolution traces back to his key papers of 1905 in which he questioned the classical understanding of our concepts of space, time, matter, gravitation, and radiation, shaking the foundations of classical physics. These papers challenged the idea of light as a wave, gave striking proof for the existence of atoms, led to a new understanding of space and time, which came to be known as the “special theory of relativity,” and identified mass as a form of energy. Ten years later, Einstein completed his relativity revolution with his masterpiece, the general theory of relativity, which became the source of modern cosmology. Albert Einstein : Creator of a Worldview deals with these developments, with the ideas which led to them and with their consequences. It also describes briefly Einstein’s activity outside the world of physics and his reaction to major issues on the agenda of mankind in his time.

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.

Although frequently observed in natural habitats across Israel, the true nature of the "strange growths" (galls) that appear on various plants is not always clear. Insect-induced plant galls are actually the most intimate way in which animals feed on plants. This book reveals to naturalists and scientists one of the most impressive and conspicuous groups among gall-forming insects: aphids that form galls on wild pistachio (Pistacia). The gall serves as an incubator for the aphids, providing them with a rich food supply and shelter from natural enemies and abiotic factors. Several aphid generations develop in galls from spring to fall. During these months, the gall functions as a dynamic and complex multitrophic ecological (mini) system, including pathogens, competitors, parasites, and predators. The first part of the book describes the multi-disciplinary information on the biology and ecology of the aphids and gall system from molecular, anatomical, physiological, biochemical, behavioral, biogeographic, and evolutionary points of view. The second part of the book is in fact an informative and photographic guide to all the aphid-induced galls on wild pistachios in Israel.

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.