27 novembre 2009
La possibilità si catturare immagini di città e paesaggi dall’alto ha incuriosito la fotografia fin dai suoi esordi. Nadar nel 1858, una...
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17 giugno 2010
The traffic signal was first invented in 1912 [...] as a two-color light to warn pedestrians ahead of the impending transition. In 1920, this basic design was modified (by another policeman named William Potts) to include the tri-colored red, amber, and green lights widely used today.
This simple, three-color icon has endured for nearly a century with relatively little change, save for the incorporation of modern technologies such as automatic timers, diode lights and motion sensors. The core of the three-color traffic remains true to the initial vision of two smart American policemen.