Why Don’t Babies Smile from Birth?

Published online at scientificamerican.com on February 6, 2018. When my son was born a few months ago, he quickly established himself as the tyrant of  our household, one that ruled with a singular phonetic ultimatum (“Oooo—whaaah”), tiny iron fists clutched in fury, and a face that roiled like the churning sea. His placid silence instantly … Continue reading Why Don’t Babies Smile from Birth?