18 famous inventions of ancient China
The first compass is calledIntelligent data collection rain
Rolf Hut, of Delft University of Technology in the Netherlands, is planning to turn small umbrellas into rain gauges.Pole attached to the lamp post, automatically spread when rain
To help those who forget to bring their umbrellas down the street, the Russian designer Mikhail Belyaev devises a type of umbrella attached to a street lamp that can automatically