Babies seem to have most of the major emotion expressions and smiling appears to be universal https://www.galvnews.com/health/free/article_c0d6e928-4122-5337-9c

Babies seem to have most of the major emotion expressions and smiling appears to be universal https://www.galvnews.com/health/free/article_c0d6e928-4122-5337-9c26-7f4e357dbd3b.html https://www.galvnews.com/health/free/article_c0d6e928-4122-5...