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| Monogamy reduces major social problems of polygamist cultures Posted: 24 Jan 2012 06:31 AM PST In cultures that permit men to take multiple wives, the intra-sexual competition that occurs causes greater levels of crime, violence, poverty and gender inequality than in societies that institutionalize and practice monogamous marriage. That is a key finding of a new study that explores the global rise of monogamous marriage as a dominant cultural institution. The study suggests that institutionalized monogamous marriage is rapidly replacing polygamy because it has lower levels of inherent social problems.  |
| DNA motor programmed to navigate a network of tracks Posted: 22 Jan 2012 12:25 PM PST Scientists have successfully used DNA building blocks to construct a motor capable of navigating a programmable network of tracks with multiple switches.  |
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