With favourable weather predicted and a team of scientists on her side, Australian Chloe McCardel will set out on Wednesday to become the first person to make the 103-mile (166-km) swim between Cuba and the Florida Keys without a shark cage to protect her.
A 64-year-old American long-distance swimmer, Diana Nyad, completed a 35-year-long quest to cross the Florida Straits on Monday, becoming the first person to swim from Cuba without a shark cage.
Paddleboarders sit or kneel on a glass fiber board, a cross between a surfboard and a kayak, and paddle with their hands and arms