1. football
1.1. History
1.2. el futbol es el deporte mas famoso del planeta!!
2. waterpolo
2.1. History
2.1.1. The rules of water polo were originally developed in the mid-nineteenth century in Great Britain by William Wilson. The modern game originated as a form of rugby football played in rivers and lakes in England and Scotland with a ball constructed of Indian rubber. This "water rugby" came to be called "water polo" based on the English pronunciation of the Balti word for ball, it means pulu. Early play allowed brute strength, wrestling and holding opposing players underwater to recover the ball; the goalie stood outside the playing area and defended the goal by jumping in on any opponent attempting to score by placing the ball on the deck.
3. basketball
3.1. rules
4. baseball
4.1. history
4.1.1. The history of baseball in the United States can be traced to the 19th century, when amateurs played a baseball-like game by their own informal rules using homemade equipment. The popularity of the sport inspired the semi-pro national baseball clubs in the 1860s.h
4.2. rules
5. tennis
5.1. history
5.1.1. The game that most people call 'tennis' is the direct descendant of what is now known as real tennis or royal tennis (which continues to be played today as a separate sport with more complex rules). Most rules of the game commonly known as tennis derive from it. It is reasonable to see both sports as variations of the same game. The idea that tennis originated in the monastic cloisters in northern France in the 12th century has been largely discredited, but it is correct that in the first few centuries in which it was played, the ball was then struck with the palm of the hand; hence, the name jeu de paume ("game of the palm"). It was not until the 16th century that rackets came into use, and the game began to be called "tennis." It was popular in England and France, and Henry VIII of England was a big fan of the game, now referred to as real tennis.