The study of cosmic rays (CR) has a long history. In their efforts to understand these elusive particles coming from space, researchers have climbed mountains, traveled to the far corners of the Earth, ridden hot-air balloons, operated complex instruments floating on balloons above the atmosphere or aboard space vehicles.The information collected here is just a partial summary of this fascinating scientific adventure.


The early days of CR research (extracted from: M.G.Bagliesi - Ph.D. Thesis - 2006 - Univ. of Siena) a brief summary of cosmic-ray research from the historical balloon flight of Victor Hess in 1912 to the eighties.