The history of Water Polo as a team sport began as a demonstration of strength and swimming skill in late 19th century England and Scotland, where water sports and racing exhibitions were a feature of county fairs and festivals. Men's water polo was the among the first team sports introduced at the modern Olympic games in 1900. Water polo is now popular in many countries around the world, notably Europe (particularly in Hungary, Greece, Italy, Russia, Croatia, Serbia, Montenegro), the United States, Canada and Australia. The present-day game involves teams of seven players (plus up to six substitutes), with a water polo ball similar in size to a soccer ball but constructed of waterproof nylon. The rules of water polo were originally developed in the late 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, 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.
Marco Polo wasn't an inventor he was a merchant.
No. The Chinese did and Polo wasn't an inventor, but a merchant.
Marco polo
the inventor of chocolate and chocolate chips is unknown
Marco Polo died in Italy, the town or city is unknown.
Unknown
The inventor is unknown
The inventor of the wedge is unknown
unknown
Inventor is unknown, but Hungarian people brought it to Europe."Before the Hungarians, buttons were unknown in Europe."Source: http://dieselpingwin.multiply.com/reviews/item/8
The inventor of fireworks is unknown; fireworks originated in seventh century China and the inventor remains lost to unrecorded history.
The inventor of recycling is unknown there really was never an inventor and everyone that picthed in to help all wanted the world to go green