The long-distance swimmer Diana Nyad took close to 53 hours non-stop to swim the 103 miles between Cuba and the Florida Keys, becoming the first ever to do so without a shark cage and at the young age of 64 years old.
Sharks and jellyfish are no match for sheer determination.
Diana Nyad has had attempt this journey several times in the past.
Her first attempted for this swim was in 1978 in a shark cage.
In 2011 she attempted the swim twice with no shark cage, but had to stop because of shoulder pain the first time, and jellyfish stings on the second.
Her last unsuccessful attempt ended in August 2012.
This time, Nyad does not swim in a protective cage, so she has no real defense against aggressive sharks or, the more likely threat, jellyfish - which have stopped her in the past by inflicting so many stings that she simply couldn't continue.
Surely Nyad had to realize that she would face the same danger this time, but she didn't let that stop her. A special silicone mask is designed to...