BodyInterestingFemale brains typically reach full maturity in the early-to-mid 20s, while male brains don't fully mature until the mid-to-late 20s, primarily due to differences in prefrontal cortex development.1k4k
BodyInterestingWhile newborns have tear glands from birth, they typically do not produce visible crying tears until they are approximately two weeks to three months old.701k