Jeju Haenyeo, which translates to "women of the sea," started diving at around 15 years old. They would gather sea urchins, seaweed, octopuses, and abalone.

Professional cliff diver Molly Carlson posted a video of her "nightmare" accident, which saw her slipping off a 72-foot ...

The all-female Korean Haenyeo divers show genetic adaptations to cold-water diving involving their blood pressure and cold tolerance. It's "like they have a superpower," says one of the researchers.

Testing a diving superpower . Ilardo and her team compared 30 Haenyeo divers' genomes to the genomes of 30 non-Haenyeo people from the island of Jeju, as well as 31 people from mainland Korea.