Marble machines are the kind of useless mechanisms that everybody loves. Their sole purpose is to route marbles through different paths for your viewing pleasure. They can be extremely complicated ...

A washing machine, especially the fully automatic one, is one of those appliances where the difference between a good ...

The majority of the 300 million tons of plastic produced every year isn’t recycled, and recycling that does happen typically happens at an industrial scale in factories using equipment that can cost ...