Horses are gregarious animals who live in herds. While they need a leader, they operate most of the time as a team. Their ability to work together, to synchronise and to communicate effectively is key for their survival. That's because, if the herd doesn't move fast enough soon enough, some of its members are likely to be eaten by predators. Humans are in many ways similar: we don't take to isolation very well. We need to be in groups, and for thousands of years our social gr