and metalwork, and thus be used as a benchmark to grade the level of societal progress. Some Neopagans such as Wiccans have adopted the Wheel of the Year into their religious practices. See also Types: Alloy wheel, Artillery wheel, Ball transfer unit, Bicycle wheel, Caster, Cogwheel, Dreadnaught wheel, Driving wheel, Flywheel, Hubless wheel, Inline skate wheel, Mansell wheel, Mecanum wheel, Motorcycle wheel, Omni wheel, Pedrail wheel, Pressed Steel wheel, Skateboard wheel, Square wheel, Stairclimber wheel, Steering wheel (Ship's wheel), Train wheel, Tweel, Wagon wheel, Wire wheel Components: Axle, Bogie/Truck, Differential, Drive shaft, Drivetrain, Rim, Snow chains, Spoke, Tire, Wheelset Related technologies and concepts: Archimedes screw, Barrel, Breaking wheel, Color wheel, Compact disc, Ferris wheel, Pottery wheel, Propeller, Reinventing the wheel, Spindle whorl, Trackball, Wagon-wheel effect, Water wheel, Wheelbarrow, Wheelie, Wheel of Fortune, Wheelwright, Windlass, Windmill Alternatives: Air cushion, Continuous track, Counter-rotating screws, Leg mechanism, Magnetic levitation, Wing-in-ground-effect History: History of the wheel in Africa, The Horse, The Wheel and Language, Rotating locomotion in living systems, Terrestrial locomotion in animals: Rolling, Robot locomotion Theory: Rolling resistance, Rotational energy, Torque, Wheel and axle (simple machine), Wheel sizing References External links University of Kiel. "3400 BC: The oldest evidence for the use of the wheel and wagon originates from Northern Germany". Online: April 11th, 2022. Retrieved: April 14th, 2022. Iraqi inventions Mesopotamian inventions