In this episode we will continue our journey to discover planet Earth. This time we will go underwater to discover things never seen before. Then we will see: the Transmilenio, Bogota's public transport system. Among the wrecks at the bottom of the Mediterranean, a ship of the sky, the B-17 bomber. A masterpiece that was thought to be lost discovered by new technologies. Can winds and computers find a common language? Music from garbage: playing Mozart with recycled materials. The great plague epidemics of the past, a tragedy but also an opportunity for growth. Two generations compared: how Italian homes have changed in the last fifty years. What is inside the thousands of beauty products that women spread on their bodies every day? A journey into the minds of animals: dogs and monkeys, two intelligences compared.