Mamaknowsbest

fuckyeahneuroscience:

Many animals yelp or cry out when they’re in pain. But as far as scientists can tell, we humans seem to be the only species that shed tears for emotional reasons. Scientists who study evolution say crying probably conferred some benefit and did something to advance our species — because it’s stayed with us.

Tears are universal. We need them to keep our eyes lubricated, but why on earth should streams of salty drops spew forth from our eyes, blurring our vision and making our eyes puffy when we get emotional?

Click for the rest of the article and to listen on NPR’s Morning Edition.