Ultraviolet (UV) light is known to inactivate some viruses, and Dr. Phil Rice, virologist at St George’s, University of London believes his findings show UV rays could inactivate the varicella zoster virus, responsible for chickenpox and shingles on the skin before it transmits to another person.
Depletion of the ozone layer, the shield that protects life on Earth from harmful levels of ultraviolet rays, has reached an unprecedented level over the Arctic this spring because of the continuing presence of ozone depleting substances in the atmosphere and a very cold winter in the stratosphere,according to the World Meteorological Organisation (WMO).
Like humans, the light skinned whales seemed to have the most difficulty dealing with the sun. Blue whales had more severe skin damage than their darker skinned counterparts, fin whales and sperm whales, even though the latter spend so much time at the surface.
Brief exposure to UV light can cause mutations in the DNA of skin cells, including the host cells for melanoma. Sufficient of mutations can result to skin cancer.
Some people wear sunglass to protect their vision from glare and from harm of the ultraviolet rays emitted by the sun; while some do it to make them look good and enhance their appeal; and others to cover their defective eyes or some unwanted marks around their eyes.