Investigating the different reasons that lead animals to face tough disputes, from fierce hand-to-hand fighting, peaceful fashion shows, colorful displays and extravagant tournaments or dance contests.

Family is everything, at least to a good number of animals. Many species live in families, clans, or groups. Discover how the survival of each individual depends on the family, and the family depends on the union of all its components.

The most elemental and pure survival is based on eating. Everything else is accessory: if there is no food, if you are not healthy, strong and agile, you cannot compete to mate, you cannot defend your family from any threat, and much more to survive.

Love rivalry shakes every fiber of the body: hormones invade the blood and some of the most overwhelming spectacles on the planet are produced. Discover the fight for reproduction stimulating the most striking and diverse behaviors of the animal world.

Territory is home, the place where animals rest, find food or have their children. Many animals are very territorial: they mark, protect and defend their small nations against the invasion of strangers: their survival depends on it.

Among animals, there are many species, including humans, that live in complex and hierarchical societies. Discover how animals form clans or groups where there is an all-powerful leader who ultimately makes the most vital decisions.