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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