Welcome to the January 2005 issue of Scientific American
. This month's edition features five articles. First, we will learn about our immune system's early warning mechanisms, and how studying them can lead to new therapies for immunity-related disorders. Then, we learn that even though the universe we live in is getting older, that doesn't mean its glory days of galactic collision and black-hole formation are over. Also in this edition, we'll hear about the advent of considerate computers, the resurrection of a World War I-era killer flu virus, and the dangers of the self-esteem myth.
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