I just finished a book called "The Wellness Project: A Rocket Scientist's Blueprint for Health" by Roy Mankovitz and in it, he discusses how he is funding research at The University of California Santa Barbara for a new type of sunscreen withOUT chemicals.

I was looking at the author's website and found an article he wrote in regards to sunscreen. Here is the link:
http://montecitowellness.squarespace.com/health-related-inventions/

By the way, the book is awesome. All about a detailed paleo-diet and detox plan that the author came up with. There is a LOT of wonderful information and I suggest reading it.