Past, present, with a peak into the future, in the field of applied science, that manages to avoid the textbook approach and is instead stimulating reading. From evolution, to power, rays, industrial materials, speed, measurement, to food, medicine, whether, flying, communication, exploration, fossils, photography, crime, to science and the war, the sea, the universe -- the practical application to life to-day and tomorrow is shown, as well as the activities in all these fields. Excellent for young people.