Many people believe that birth order shapes our personalities and has impact on the careers we choose, and the ways we behave. However, it is difficult to conduct good research on birth order, and ...

Researchers are further exploring the notion that having an older brother increases a man's chances of being gay. It's called fraternal birth order effect. Researchers are further exploring the notion ...

Birth order doesn’t just determine when family photos are arranged. According to developmental psychologists, your position in the family constellation significantly influences personality development ...

There are lots of expectations and assumptions about how birth order may shape our adult lives, and many of them go back ages. Centuries ago, the oldest son had huge incentives to stay on track and ...

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these stories ...