Italians learn to respect the highway code: the new law and cutting-edge technological tools help to avoid causing unnecessary massacres. Lorenzo Pinna and Alessandra Canonico, in a report, take stock of accidents in Italy and show us the latest innovations for controlling the speed of cars. They are certainly not domestic animals, yet hippos are dear to the imagination of children. They seem reassuring and peaceful with their funny size. In reality they are irascible and dangerous animals. They live, mate and give birth in water and the role of the leader is crucial for the life of the group.