Amazon.com description: Product Description: Cosmic rays are highly energetic particles that travel through space at close to the speed of light and continuously bombard the Earth's atmosphere from all directions. Offering coverage on this field, this text aims to educating a wide audience and to be easier to read and understand than its more specialized competitors. Topics are discussed on two levels; the first on a general basis, with minimum mathematics, and the second through a collection of formulae and results.