Huffpost Science
Cara Santa Maria Headshot

Crying Science: Why Do We Shed Tears When We're Sad? (VIDEO)

Posted: Updated:

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, I spoke with expert Dr. William H. Frey, who also serves as director of the Alzheimer's Research Center at the HealthPartners Institute for Education and Research in St. Paul, Minn. He explained that not all tears are the same.

Check out the video above and/or click on the link below to learn more. And don't forget to leave your thoughts in the comments section at the bottom of the page. Come on, talk nerdy to me!

CLICK HERE FOR FULL TRANSCRIPT

See all Talk Nerdy to Me posts.
Like Cara Santa Maria on Facebook.
Follow Cara Santa Maria on Twitter.

Also on HuffPost:

The Brain As Art
of
Share
Tweet
Advertisement
Share this
close
Current Slide

Suggest a correction

Around the Web

Crying - Wikipedia, the free encyclopedia

Tears - Wikipedia, the free encyclopedia

HowStuffWorks "How Crying Works"

7 Reasons Crying Is Good for You

Crying It Out - NYTimes.com

Why Crying Is Good for You | Psychology Today

Why Humans Like to Cry