Aging is considered an increasing apprehension for healthful postmodern life. Scientific data suggest some gain in the number of healthy years but also a greater increase in compromised physical, mental, and social functions. Insightful knowledge on mental disorders of aging is greatly inadequate, thus needing novel innovative hypotheses and future experiments. This book is a real-life presentation of science of aging, especially for the public. It includes 7 chapters and briefly addresses how aging phenomenon is related to cell biology, cell biochemistry, systemic endocrinology, and immunity. One specific chapter provides insights into how life-time nutrition affects and is concerned with aging. After all, aging will not keep mankind from persistent renovation.