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ELI5: Why are we attracted to a pretty face in terms of mate selection? Physical features of the body show traits that are important to survival/reproduction but what do facial features show?
ELI5: Since magnetic north is not the same direction as true north, when and how did navigators figure this out, how did they compensate, and does the advent of GPS navigation render the magnetic compass completely obsolete?
ELI5: Why is it common advice to splash cold water on your face after washing it to "close your pores"? Wouldn't they just go back to normal size as soon as your skin gets back to normal temperature?