Reflector on the bicycle

Wheels of a freight train

Cog wheels, studio shot, still

"Detail view of the rudder of an old sailing ship, Timmendorf, Poel island, Mecklenburg-Western Pomerania, Germany, Europe"

London Eye, partial view, London, England, Great Britain

Main landing gear, Lufthansa Airbus A350-900, Munich Airport, Upper Bavaria, Germany, Europe

"Mechanical hand wheel, turbine house, old hydropower plant in Rheinfelden, 1898-2011, view before the demolition, Rheinfelden, Baden-Wuerttemberg, Germany, Europe"

Landing gear, Airbus, A380-800, Lufthansa, Munich Airport, Upper Bavaria, Bavaria, Germany, Europe

Main landing gear, left, suspension, hydraulic hoses, steering, brakes, Lufthansa, Airbus, A 350-900, Germany, Europe

Barrel organ, sound pickup system, worm gear wheel with metal rod as a crank gear, Grassau, Upper Bavaria, Bavaria, Germany, Europe

Blue-tailed damselfly (Ischnura elegans), mating wheel, Goldenstedter Moor, Lower Saxony, Germany, Europe

Vintage Triumph Roadster 2000, radiator, built in 1948, 4 cylinders, displacement 2000cc, 3 forward gears, 60 hp, 100 km/h, aluminum body

"Blue-tailed Damselfly (Ischnura elegans), couple copulating, mating wheel position, North Rhine-Westphalia, Germany, Europe"

Clocks on gear wheels superimposed on a circuit board

Fixed-gear road bike against a white background.

Components of a fixed-gear road bike against a white background.

view of the brain of a boy

Technologies featuring information and communication

Skull with cogs and wheels in brian

Rear view of a man by a big computer screen and clock

Thought process, artwork

"Metal gears, computer illustration. "

"Metal gears, computer illustration. "

Bicycle cassette, close up.

Thought process, artwork

A lion sea captain steering a ship's helm

"Interlocking gear wheels, detailed view"