PeopleInterestingWhile many animals produce tears for lubrication and protection, humans are unique in shedding tears in response to emotions such as sadness, joy, or frustration.4692k
PlacesInterestingThe longest commonly-recognized words with no repeating letters are "uncopyrightable" and "dermatoglyphics," both at 15 letters!1092k
BodyMind-BlowingA fetus develops fingerprints starting at 10 weeks, with unique patterns fully formed by 17 weeks of pregnancy.39828