>> My heuristic has been: we made it a really, really long time with more sun exposure than I can get if I try, before sunscreen was even invented I think your

>> My heuristic has been: we made it a really, really long time with more sun exposure than I can get if I try, before sunscreen was even invented I think your heuristic needs to be updated a bit to account for some recent changes to the environment... Things today are not exactly as they were "a really, really long time" ago.