This book is a study of the phenomena of shadows, meant in a broader sense as “symbolic forms”. The shadow is a less real, “surface” replica of some more real form. From the Platonic point of view, empirical objects are “shadows of ideas”, while from the modern “natural” point of view, shadows are seen and conceived primarily as “weaker” replicas of bodies, which give evidence of their material reality. In the first three essays here, several topics from the Ancient Egypt and Greece to modern arts and sciences are considered, while in the fourth essay, the contemporary virtual reality, cyber-technology and the internet as our parallel “shadow world” are discussed from the philosophical point of view. The main and innovative point of this book is the connection between the meaning of shadows in philosophy and art on the one hand, and their role in modern science and technology on the other. The book will appeal to a wide span of readers, from academic circles, students, and artists, to the general reader interested in the humanities, especially in philosophy and art.