You don’t walk into a temple expecting to cry. You go because it’s tradition. Or obligation. Or curiosity. You go because someone said it brings peace, and peace, let’s face it, has been missing ...

Terminator: Why do you cry? John Connor: You mean people? Terminator: Yes. John Connor: I don't know. We just cry. You know. When it hurts. Terminator: Pain causes it? John Connor: Uh-uh, no, it's ...

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 ...