The use of a single wheel also allows for more control over the disposal of the load after emptying. A wheelbarrow is a tiny hand-propelled vehicle, generally with only one wheel, that is meant to be pushed and steered by a single person using two handles at the back, or by a sail to move the ancient wheelbarrow by wind. The word comes from British English, where it was known as a "wheeler" or "whirler". In American English, it's called a "hand cart" or "two-wheeled cart". A wheeled container used to transport heavy loads over short distances is called a wheelrel. It includes all kinds of vehicles used for this purpose, such as cranes, dump trucks, and tractors with attached containers. The oldest evidence of the use of a single-wheeled device for transportation has been found in Turkey, dating back 5,000 years. By the Late Bronze Age (about 2,500 years ago), people in Europe were making vessels out of bronze that had rims of thick metal attached to their surfaces to serve as wheels. These were probably used like modern chariots by individuals or teams of riders who controlled them with reins and flags. In America, they are calling these things "chariots" again! Single wheels are also used in many other tools and appliances, such as window cleaners, lawn mowers, skateboards, and sewing machines. They are even used as parts of toys and games.