Humans are the only animal to produce emotional tears. Asking questions about this behavior can help us better understand how we live our lives. That question has many answers. To start, there are ...

All humans cry. Some of our tears are meant to keep our eyes moist and healthy. Others clean out the eye from dust, pollens ...

We’re the only species that sheds emotional tears, but much about them remains an enigma. Credit... Supported by By Dana G. Smith Illustrations by Dominic Kesterton The last thing that made Dana Smith ...

Michelle Spear does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...