Astronomers reveal supermassive black hole's intense magnetic field Astronomers from Chalmers University of Technology have used the giant telescope Alma to reveal an extremely powerful magnetic field very close to a supermassive black hole in a distant galaxy. The results appear in the 17 April 2015 issue of the journal Science.
Maunsell Sea forts (2). In the midst of WWII, London was the busiest port in the world. German Navy wanted to destroy London supply by closing entrance to the Thames river. They tried to do damage to the British with the magnetic influence mines. Hundreds of ships were lost, and the anti-Hitler coalition, had to find a solution. Knowing that the mines were dropped in the sea from irplanes, Guy Mansell (1884-1961), a British engineer, created a plan for coastal protection. Maunsell Sea Forts