When the Happy Face Disappears, Go in the Shade
Michigan Tech students have devised an ultra-violet light sensor that tells you when its time to take action to avoid sunburn.
The biomedical engineering seniors developed a skin patch imprinted with a graphic—in this case, a happy face design. The nickel-size patch gradually darkens under ultraviolet light, the type of light that causes sunburn and skin cancer. When you can't see the happy face anymore, it's time to get out of the sun. 
Tweet it
Facebook






Submit an Event
[
Follow Us