From the piston effect of 1904 to fully air conditioned cars by 1993, the NYC subway's 89-year journey to cool its trains is a story of persistence through failure.

The one-of-a-kind moving service that ONLY exists in Korea!📦 In Korea, there's a moving method you won't find anywhere else in the world: the ladder truck service. This innovative solution uses… | Cheddar

This device reinvented the traditional life-jacket for swimmers! One near-tragedy sparked an idea. A group of engineering students at the University of Karlsruhe decided to reinvent water safety… | Cheddar