1 The Sun Sun Myths and Sun Worship. - Sun and Sunlight. - Sun Myths and Worship. - 2 Sunlight and Life. - The Ultraviolet Spectrum. - The Primitive Atmosphere. - Life and the Secondary Atmosphere. - Evolution of Photosynthetic Cells and Development of an Ozone Layer 27. - Life in the Aerobic Phase. - 3 Is Sunlight Good for You?. - Sunbathing. - Bacteria and Ultraviolet Radiation. - Skin Tuberculosis. - Bone and Pulmonary Tuberculosis. - Skin Diseases. - Vitamin D and Rickets. - 4 How Ultraviolet Radiation Affects the Cell. - Radiation and Its Action. - How Do Cells and Organisms Protect Themselves?. - Mutation. - Why Repair?. - 5 Sunburn. - Action Spectrum of Erythema. - How the Skin Gets Sunburned. - Tanning. - Variation in Skin Sensitivity to Sunburn. - Intracellular and Molecular Changes in Sunburn. - Recovery from Sunburn. - Protecting the Skin from Sunburn. - Effects on the Eye. - 6 How Sunlight Ages Skin. - Pattern Changes. - Melanocytes. - Lubrication. - Wrinkling. - Blood Vessels. - Connective Tissue. - Comedones (Blackheads). - Ultraviolet Action Spectra. - Racial and Genetic Differences. - Aging. - 7 Photosensitization of Cells. - Natural Photosensitizers. - Photosensitization by Medications. - Photosensitization in Diseased Conditions. - Protection from Photosensitization. - 8 Sunlight and Cancer. - Animal Experiments. - Sunburn Injury and Human Carcinogenesis. - Relative Malignancy of Skin Cancers. - Photosensitized Reactions to UV-A Rays. - 9 How Atmospheric Pollution Affects Sunlight and Life. - Natural Tropospheric Smog. - Man-Made Tropospheric Smog. - How Tropospheric Smog Reduces Antirachitic UV-B Rays. - How the Nitrogen Cycle Regulates StratosphericOzone. - Supersonic Transports. - Atomic Bombs. - Spray Can and Refrigerator Freons. - What Are the Consequences?. Language: English