Today, Google shows a new "doodle"; the logo has become an electromagnetic wave, in honor of the 155th birthday of the german phycisit Heinrich Rudolf Hertz :
Hertz (wikipedia page) was the first (in 1886) to identify invisible electromagnetic waves, that we use today to transmit radio and (terrestrial) television signals. The unit of measurement of the frequency of such a wave is called the hertz, in his honor.
1. le 24 f?vrier 2012 (10 h 29), par nyco :
He also invented the rental car. (true story)