Plot: This episode of Superquark opens with a magnificent documentary from the USHUAIA series: One day the earth sank. From the Bahamas to Mexico, crossing Cuba and the island of Montserrat, Hulot and his team tell us the story of the geological, animal and human evolution of those places that witnessed an upheaval, 60 million years ago, due to the fall of a meteorite, one of the probable causes of the disappearance of the dinosaurs