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 ...

On South Korea's largest island, Jeju Island, a group of women free-dive into frigid waters year-round to harvest food from the seafloor without using any special equipment. They dive down to depths ...

A group of women on South Korea's largest island, Jeju, follow a unique tradition to put food on the table: They freedive to depths of nearly 33 feet (10 meters) without using any special equipment.

A group of women on South Korea's largest island, Jeju, follow a unique tradition to put food on the table: They freedive to depths of nearly 33 feet (10 meters) without using any special equipment.

A couple of years ago, Melissa Ilardo found herself aboard a motorboat traversing the ocean around Jeju Island, which sits some 50 or 60 miles off the coast of South Korea. Before the vessel had even ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. An island 50 miles ...

From high-altitude climbers to divers who can fish without scuba gear, scientists are finding new ways that human bodies may be genetically adapting to environmental extremes. Many women who grow up ...