Scientific American April 2009

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Dark Energy Does It Really Exist? Or Does Earth Occupy A Very Unusual Place In The Universe
Color Vision Our Eyes Reflect Primate Evolution
Green Lasers The Next Innovation In Chip-Based Beams
Soldiers' Stress What Doctors Get Wrong About PTSD

Title: Scientific American April 2009

Series: Scientific American

Item Number: SCIENTIFICAM200904

Chris Defendorf - August 1, 2012

★★★★★

I Love this magazine issue. Makes me feel good.