Compound Interest's original post on Fake Tanning is here and for Suncreen, it is here.
Here is a TED-Ed video on why we need to wear sunscreen!
Here is an interesting TED talk about skin color.
Nina Jablonski says that differing skin colors are simply our bodies' adaptation to varied climates and levels of UV exposure. Charles Darwin disagreed with this theory, but she explains, that's because he did not have access to NASA.