June 4, 2013 (HP60).  The Editorial Board of Reports on Progress in Physics (ROPP) made freely accessible for the next 6 months several overview papers of which the following two should attract attention of our readers: 

• Overview on the physics and materials of the new superconductor KxFe2−ySe2
  Hai-Hu Wen 2012 Rep. Prog. Phys. 75 112501

• History and progress on accurate measurements of the Planck constant
  Richard Steiner 2013 Rep. Prog. Phys. 76 016101