Informal surveys suggest that as many as half of passengers have cried on an airplane at some point. Plenty of people claim that even though they aren't usually criers, something about the friendly skies makes them weep. Though scientists have never studied the phenomenon, experts point some fascinating reasons for it.
Why It's Noteworthy
How It Works
Editors' Picks: Our Favorite Videos About Why We Cry
Why Do We Cry?
Like, besides to lubricate your eyes. This video goes beyond that, we swear.
Key Facts In This Video
Crying due to sadness is mostly a human experience. 00:41
Tears of joy are also used as social signals as to how we feel. 01:31
The Science of Ugly Crying
We all do it. No shame.
Do Animals Cry Emotional Tears?
If only we could ask them.
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