A three-and-half-week-old baby makes a “laughter face” in response to being exposed to the smell of kale. The infant’s mother had taken kale capsules while the baby was in the womb.

A three-week-old baby makes a “laughter face” in response to being exposed to the smell of carrot. The infant’s mother had taken carrot capsules while the baby was in the womb.

In this day and age, there are not many things that remain a mystery. As medical science moves forward, we are uncovering ...