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History and the Decline of Human Violence

Steven Pinker, a professor of psychology at Harvard University, is the author of the best-selling books, “How the Mind Works,” and “The Blank Slate.” But he is also a public intellectual, devoted to bringing the ideas of academia to questions of broad public interest. His latest work is an ambitious attempt to understand the origins, history--and perhaps the future--of human violence.

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World’s Dams Unprepared for Climate Change Conditions

Over the past four years, John Matthews has been traveling the world to better understand freshwater and climate change issues. He found that poor planning is creating one of the biggest water-related threats.

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Understanding the interplay of grains helps cars drop the pounds, be more fuel efficient

Sometimes solving the biggest challenges begins with understanding something very small -- like the tiny grains that form a piece of metal. For a team of scientists who wanted to improve automotive fuel efficiency, understanding and controlling the size of the grains in aluminum allowed the design of an easy and inexpensive method for producing lightweight automotive parts, replacing heavier steel, leading to improved fuel efficiency

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Obama’s Big Gamble over Small Business Job Growth

How can Obama have the biggest impact when he speaks to Congress about job creation Thursday evening? It’s hard to overestimate the delicacy of the challenge President Obama faces in his speech Thursday night to a joint session of Congress

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Dark matter may be an illusion caused by the quantum vacuum

(PhysOrg.com) -- One of the biggest unsolved problems in astrophysics is that galaxies and galaxy clusters rotate faster than expected, given the amount of existing baryonic (normal) matter. The fast orbits require a larger central mass than the nearby stars, dust, and other baryonic objects can provide, leading scientists to propose that every galaxy resides in a halo of (as yet undetectable) dark matter made of non-baryonic particles. As one of many scientists who have become somewhat skeptical of dark matter, CERN physicist Dragan Slavkov Hajdukovic has proposed that the illusion of dark matter may be caused by the gravitational polarization of the quantum vacuum.

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Power Politics: Competing Charging Standards Could Threaten Adoption of Electric Vehicles

To most Americans electric cars are as new a concept as the first combustion vehicles were to horse-and buggy-drivers in the early years of the 20th century. But to the organizations around the world that have been working to make modern electric cars a consumer reality, it has taken decades to get to this point. In fact, the electric car industry is old enough now that it has developed its own internal conflicts--the biggest of which centers on vehicle charging

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