Setting sail from the Canary Islands in 1976, returning in 1978, Krystyna Chojnowska-Liskiewicz became the first woman on Earth to sail single-handedly around the world, 80 years after Joshua Slocum became the first man to do so. It was an epic and arduous adventure, one that Krystyna battled hard to finish. She circumnavigated 31,166 nautical…