Feel like your parents always favored your older sibling? They might have benefited from that more than you realize. A new study suggests all that extra attention makes first-born children smarter ...

If there's ever been banter about who is the most intelligent among your siblings at a family gathering, science has tipped the balance towards the eldest child. A study that evaluated available data ...

First-born children earn measurably higher incomes than their younger siblings on average. This pattern holds across diverse cultures, socioeconomic backgrounds, and family sizes. Birth order itself ...

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Feel like your parents always favored your older sibling? They might have benefited from that more than you realize. A new study suggest all that extra attention makes first-born children smarter than ...