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Three Gorges

China began to block the main channel of the Yangtze River. It was a preparation for construction of the Three Gorges Dam. The dam body was completed in 2006. Last water turbine was completed in 2012. Three Gorges is the largest power station in the world. Its height is 181 m, installed capacity 22,500 MW.

X-rays

Wilhelm Röntgen discovered the X-rays. Röntgen was not first who observed them, but he was the first who studied them systematically. He wrote about his experiments to other physicists, including Lord Kelvin. Röntgen gave X-rays their name. In many countries, X-rays are, however, called Röntgen rays or Röntgen radiation.

Anniversaries of the (in)famous