37. Long-Term Sun Exposure Can Cause Damage.
There is an important reason why dermatologists and plastic surgeons constantly preach the importance of wearing sunscreen: long-term exposure to the sun damages the skin (via plasticsurgery.org). You may have heard of sunspots on the surface of the sun; they also appear on your skin, albeit for different reasons. The skin can also become more wrinkled and discolored as a result. The high-school knockout who always had an enviable tan may find that they have some unenviable skin problems later in life (via National Institute of Aging).