In an unscientific survey of Times Square, Science Friday found that not one passerby could explain how sunscreen works. Dermatologist Jennifer Linder explains that and other basics of sun protection, including the meaning of SPF, and whether sunscreen blocks vitamin D production.
Source: http://www.npr.org/2012/07/06/156380368/whats-your-iq-on-spf?ft=1&f=1007
rupaul meet the press steelers vs broncos chris herren jay z patsy cline pierre thomas
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