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 ...

This then turns the smaller gear, which rotates much more quickly on the back wheel, making the bicycle move forward. Some bicycles also have gear systems that allow you to change the size of the ...

Japanese designer Haruki Nakamura makes moving ornaments completely out of paper, imitating movements seen in mechanical gears. The self-taught designer has videos that are instructional ...

In the Season finale of Shifting Gears, Riley finally understands that she and Jimmy have simply grown apart. She has changed a lot over time, and her goals in life are now different.