Brain scans, postmortem dissections, artificial intelligence and lab mice reveal differences in the brain that are linked to sex. Do we know what they mean? You're holding two wrinkly human brains, ...

Many people date partners roughly their age, but some people have quite large age gaps in their relationships. However, there has not been a lot of systematic psychological research to find out how ...

Most of us who've been in the dating pool have encountered at least one person who's simply "too busy" to actually date. You can never nail them down. They change plans on a dime, and it quickly ...