Mother of Pearl, more properly known as pearl nacre, is the hard, shiny stuff that makes up pearl exteriors and the inside of some mollusc shells. It’s... Mother of Pearl, more properly known as pearl nacre, is the hard, shiny stuff that makes up pearl exteriors and the inside of some mollusc shells. It’s...
Although the importance of sun protection has been known for thousands of years, sunscreen as we know it is a surprisingly recent thing. The earliest synthetic sunscreens, dating back to the 1930s, were somewhat useful but still fairly...