sunlight

‘Each day, Apollo’s fiery chariot makes its way across the sky, bringing life-giving light to the planet. For the ancient Greeks and Romans, Apollo was the god of medicine and healing as well as of sun and light—but Apollo could bring sickness as well as cure. Today’s scientists have come to a similarly dichotomous recognition that exposure to the ultraviolet radiation in sunlight has both beneficial (prevents obesity and metabolic disorders) and deleterious effects (sunburn, skin cancer) on human health.’– M. Nathaniel Mead...