Why Do We Shed Tears When
We're Sad?
We're all too familiar with tears welling up in our
eyes--brought on by stress, sadness, or even laughter. But why exactly
does feeling things make liquid come out of our eyes? And why is that
uniquely human? After all, we're the only species that sheds emotional tears.
To unravel the science behind sobbing, Cara Santa
Maria spoke with expert Dr. William H. Frey, who also serves as
director of the Alzheimer's Research Center at the Health Partners Institute
for Education and Research in St. Paul, Minn. He explained that not all tears
are the same.
Many animals cry as an emotional response, but humans are the only species on
the planet that create tears when crying. Crying also appears to alleviate
stress, as 85% of women and 73% of men feel better after crying
Check out the video below.
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