Flying cars, why 4-day work weeks work | 5 STORIES

“5 STORIES'' serves up five interesting stories that you may have missed. On this week’s episode: A sports car takes flight, the International Swimming Federation reconsiders its ban on Soul Caps in the Olympics, new research shows four day work weeks boost productivity, a Dutch artist creates the world’s tallest sand castle and a rare copy of the Declaration of Independence is rediscovered.