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Listen to this audiobook free with a 30-day trial. Go to http://hotaudiobook.com/free Title: Scientific American Subtitle: Powers of Two Author: Blake Edgar Narrator: Mark Moran Format: Unabridged Length: 20 mins Language: English Release date: 09-02-14 Publisher: Scientific American Genres: Science & Technology, Magazine & Radio Publisher's Summary: Blake Edgar, a contributing editor at Archaeology Magazine, writes about how monogamy helped humans evolve into the big-brained world conquerors they are today. This article was published in the September 2014 edition of Scientific American. Contact me for any questions: inforeq17@gmail.com