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In the April 2009 Issue:
Dark Energy, Does it really exist? Or does Earth occupy a very unusual place in the universe?

Also in this issue:
• Color Vision: Our Eyes Reflect Primate Evolution
• Green Lasers: The Next Innovation in Chip-Based Beams
• Soldiers' Stress: What Doctors Get Wrong about PTSD
• Virus Watch: Preventing the Next Pandemic
• Solving the Mystery of the Vanishing Bees

Download:

http://rapidshare.com/files/216948978/200904.rar

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