  The scientific achievements of the Pierre Auger Collaboration cover diverse
and complementary fields of research. The search for the origin of ultra-high
energy cosmic rays (UHECRs) is based on the measurement of the energy spectrum
and mass composition of the primaries, on studies of multi-messengers, and on
extensive anisotropy searches. With the collected data it is also possible to
explore the characteristics of hadronic interactions at energies unreachable at
human-made accelerators, and to assess the existence of non-standard physics
effects. A selection of the latest results is presented and the emerging
picture is discussed.
