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The exceptional organization of polytene chromosomes
has made fruit fly Drosophila melanogaster a premier
model organism for visualization of genes. A major
barrier to full exploitation of polytene chromosome
cytology has been the difficulty in producing good
chromosome preparations. A new, economical procedure
using high pressure and other modifications to
overcome this barrier is presented. Light microscopy
images of such slides compared to electron
microscopy images for the first time show similar or
superior detail. Results from typical staining
applications, including...

Spectacular observational breakthroughs, particularly by the WMAP satellite, have led to a new epoch of CMB science long after its original discovery. Taking a physical approach, the authors of this volume probe the problem of the 'darkness' of the Universe: the origin and evolution of dark energy and matter in the cosmos. Starting with the observational background of modern cosmology, they provide an accessible review of this fascinating yet complex subject. Topics discussed include the kinetics of the electromagnetic radiation in the Universe, the ionization history of cosmic plamas, the...