WEIZSACKER CARL FRIEDRICH VON: (1912-2007) German Physicist and Philosopher. Weizsacker made important theoretical discoveries regarding energy production in stars from nuclear fusion processes. He was an important member of Heisenberg´s team, performing nuclear research in Germany during WWII. Signed 4 x 6 photograph by Weizsacker, the image showing the German Physicist in a head and shoulders smiling pose. Signed in blue ink to the lower white border. G