Stock Photo - Professor Karsten Danzmann, director of the Max Planck Institute for Gravitational Physics (Albert Einstein Institute), smiling during a press conference at the Leibniz University in Hanover, Germany, 11 February 2016. Space researchers say they have directly proven the existence of gravitational waves for the first time. The astrophysicists from the LIGO observatory in the USA presented their discovery in Washington. Scientists from Germany were also involved in the project. PHOTO: JULIAN STRATENSCHULTE/DPA | usage worldwide. - Hannover/Lower Saxony/Germany

Stock Photo: Professor Karsten Danzmann, director of the Max Planck Institute for Gravitational Physics (Albert Einstein Institute), smiling during a press conference at the.

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