A group of women around 70 years old laugh and sing on a beach in Jeju, an island off South Korea, preparing to spend the day diving for shellfish. Moments later, they’ll plunge into frigid waters as ...

The Haenyeo women who dive deep into the East China Sea to harvest sea urchins and shellfish spend the most time underwater of any humans ever studied — one to five hours a day, researchers report ...

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 ...