Recent highlights from ARGO-YBJ

Understand

The ARGO-YBJ experiment has been in stable data taking for 5 years at the YangBaJing Cosmic Ray Observatory (Tibet, P.R.

• China, 4300 m a.s.l., 606 g/cm^2).
• With a duty-cycle greater than 86% the detector collected about 5 X 10^{11} events in a wide energy range, from few hundreds GeV up to the PeV.
• A number of open problems in cosmic ray physics has been faced exploiting different analyses.