Research on Cosmic Rays and Their Impact on Human Activities - Hardcoverby Roberta Sparvoli (Guest Editor), Matteo Martucci (Guest Editor) The galactic cosmic ray spectrum extends over 14 orders of magnitudes in energy and about 12 orders of magnitude in intensity, and it can be studied using two different methods: via the "direct detection" of the primary cosmic rays in space or at high altitude and via the "indirect detection" of secondary particles, namely the extensive air showers produced by a primary cosmic ray