In a way, this is a familiar problem for us. So much of our relationship is rooted in the unsaid or the unsayable. She once explained that in China, it’s rare to hear “I love you”—to this day, we say ...

Language is one of the few faculties that still seems to be uniquely human. Other animals, like chimpanzees and songbirds, have developed elaborate communication systems, but none appears to convey ...