The sun is a good source of Vitamin D which is very important to the body. On the other hand, overexposure to the heat of the sun can lead to skin cancer. Thus, doctors advise people to put on some sunscreen for protection. Recently, nanotechnologists have developed a sunscreen that produces melanin……
https://nano-magazine.com/news/2017/5/24/scientists-created-a-sunscreen-that-produces-melanin
