They can’t taste salt
Young babies are born with a well-developed sense of taste, but not for salt. Studies show that babies can’t taste salt until they’re about four months old. They can taste other flavors as well as adults can, especially sweet, bitter, and sour flavors (which might explain all the “baby tastes lemon” videos on YouTube), and maybe even better: some studies indicate that babies actually have more taste buds than adults do. Here are more strange facts about the human body you never knew about.
They cry … but don’t shed tears
Newborns cry an awful lot, but they can’t shed tears: they don’t have functional tear ducts until they’re between three and twelve weeks old. (They can, however, produce “basal tears,” the nonemotional tears we produce constantly to keep our eyes moist.) Don’t miss other secrets your child’s pediatrician won’t tell you.