The sun is not our enemy, it is our source of life. We lived outdoors for the whole history of our species. When we look into history we find that hunter-gatherers lived 70+ years. All animals and plants live under the sun. You even see it with domesticated animals, they seek sun and then they intuitively know when to go into the shade. Humans also have built-in mechanisms to protect ourselves from UV radiation but we also need UV radiation. Vitamin D Synthesis: UVB light int