Summary of the main results of the KASCADE and KASCADE-Grande experiments.

The KASCADE and KASCADE-Grande experiments operated in KIT-Campus North, Karlsruhe (Germany) from 1993 to 2012. The two experiments studied primary cosmic rays in the energy range from 10¹⁴ eV to 10¹⁸ eV, investigating the change of slope of the spectrum detected at 2 - 4 × 10¹⁵ eV, the so called knee. We briefly review the performance of the experiments and then the main results obtained in the operation of both experiments: the test of hadronic interaction models, the all particle primary spectrum, the elemental composition of primary cosmic rays (with the first claim of a knee-like feature of the heavy primaries spectrum) and the search for large scale anisotropies. [ABSTRACT FROM AUTHOR]