Vehicles are lifeless means of transportation. They are nearly everyone often man-made (e.g. bicycles, cars, motorcycles, trains, ships, and aircraft), although some other means of transportation which are not made by man can also be called vehicles; examples include icebergs and floating tree trunks.
Vehicles possibly will be propelled by animals, e.g. a chariot or an ox-cart. However, animals on their own, although used as a means of transportation, are not called vehicles. This includes humans carrying another human, for example a child or a disabled person.
Vehicles that do not voyage on land are often called crafts, such as watercraft, sailcraft, aircraft, hovercraft and spacecraft.
Most land vehicles contain wheels. Please observe the wheel article for examples of vehicles with and without wheels.