The Haenyeo, a group of all-female divers from the Korean island of Jeju, are renowned for their ability to dive in frigid waters without the aid of breathing equipment — even while pregnant. A study ...

First, the team assessed physiological traits related to diving in women from three populations: Haenyeo in Jeju, non-Haenyeo in Jeju, and non-Haenyeo from mainland South Korea. The researchers ...