So-called "clipless" bicycle pedals, in which a steel cleat in the sole of the rider's shoe clicks in and out of a mechanism in the pedal, are very popular with cyclists – they maximize pedaling ...

Many mountain bikers swear by the pedalling efficiency of so-called clipless pedals, in which a steel cleat on the bottom of each shoe engages a spring-loaded mechanism in the pedal. Some other riders ...

Fun fact: the first real sunglasses are believed to have been invented during the 12th century in China, and were made from a crude slab of smoked quartz that blocked the sun’s rays. Fast forward to ...