Horses have been used by humans for many things including plowing, transportation, food and in war. The first horses lived around 50 million years ago and had toes, not hooves. Horses have the largest eyes of any land mammal, they have a range of vision of 350 degrees and can see in two colors. Horses are social animals and can live 25 years in small herds in the wild. They have a complex sort of communication which includes sound and body language. Since they spend many years together with the same animals in their herd, they form close emotional bonds with them. While "breaking" horses often using very harsh tactics for many years was the preferred method of training them, many people have found that learning how to communicate with horses through understanding their behavior and body language to train them is a better, safer and faster training method for both the horse and the human.