This book presents the progress in cosmic ray physics following the recent results obtained by balloon, satellite and underground experiments. The following topics are reviewed: Composition and propagation of cosmic rays, trapping of charged particles in the earth's magnetic field, atmospheric neutrinos, and high energy photon measurements in space.

There is general agreement among astrophysicists that most of the matter in the universe is dark, but a wide divergence of views about what this dark matter is. This volume addresses the problem of detecting and identifying dark matter candidates from axions to black holes. Although theoretical issues are considered, the focus of the book is on observational and experimental techniques, current results and future prospects.

The objective of the workshop series ?The Identification of Dark Matter? is to assess critically the status of work attempting to identify what constitutes dark matter; in particular, to consider what techniques are currently being used, how successful they are, and what new techniques are likely to improve the prospects for identifying dark matter candidates in the future. This proceedings volume includes reviews on major particle astrophysics topics in the field of dark matter, as well as short contributed papers.

This volume is the latest in a prominent biannual series of scientific meetings on the exciting research topics of dark matter and, more recently, of dark energy. It contains a state-of-the-art update on detection efforts by experimental groups around the world trying to pin down exotic new forms of matter under the names of axions, neutralinos, wimps, primordial black holes, q balls, sterile neutrinos, as well as a tantalizing new form of dark energy component called phantom energy and quintessence. The book is self-contained as it also includes general reviews on recent cosmological observations ? supernovae measurements, cosmic matter distribution surveys and cosmic radiation anisotropies ? introducing even the uninitiated reader to this fascinating frontier of research.

Dark matter has become one of the most exciting and central fields of astrophysics, particle physics and cosmology. The lectures and talks in these proceedings emphasize equally the experimental and theoretical perspectives of the ongoing search for dark matter in the universe, stressing in particular the interplay between astro- and particle physics.