A study finds that dads who spend more time with their kids have a different brain structure compared to less involved fathers. University of Essex researchers found men who want to actively be involved in childcare and enjoy time with their kids have a larger hypothalamus– the part of the brain known to play a key role in attachment and parenting. Researchers are unsure whether the hypothalamus increases in size in response to time with children, or whether some men are born with an increased volume. A researcher says, “Dads– like moms– are biologically wired to be parents. Our data revealed that this can be seen in dads’ brain anatomy as well as brain-to-brain synchrony with their kids, and especially so for more confident and involved fathers.”