| http://www.w3.org/ns/prov#value | - Tears of sadness, anguish or joy - or witnessing those of others and responding with empathy - have, he argues, been a vital part of our evolution.Crying in response to music, art or other aesthetic experiences are also unique to humans.it is this adjunct function of our tears - alongside the bio-mechanical function of keeping our eyeballs moist, healthy and free of irritants - that really sets us
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