As one gear turns, the other gear must also turn. Where the gears meet, the teeth must both move in the same direction. In the diagram, the teeth of both gears move upwards. This means that the ...

As there are teeth around the edge of the gears they grip together and so can withstand a greater force, enabling them to move large items such as cars or bicycles. However, the two gears can vary ...

As exciting as the rumored Gears of War trilogy collection sounds, it could be a double-edged sword for The Coalition and the series as a whole.