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Spearheading a rapidly-growing business has its challenges but don't resist the urge to evolve as the business grows. Steering a rapidly growing and evolving business is one of the most exciting endeavors an entrepreneur can undertake

(PhysOrg.com) -- During the past few years, CERN physicist Dragan Hajdukovic has been investigating what he thinks may be a widely overlooked part of the cosmos: the quantum vacuum. He suggests that the quantum vacuum has a gravitational charge stemming from the gravitational repulsion of virtual particles and antiparticles. Previously, he has theoretically shown that this repulsive gravity can explain several observations, including effects usually attributed to dark matter.

When most executives are looking to the future for their success, maybe it's better to first look back at your past. Here's why

Infant mortality has continued to drop in the U.S. during the past several decades. But stillbirths--when a fetus dies after 20 or more weeks of gestation--have remained relatively steady--and account for almost as many deaths as those of babies who die before their first birthday .

According to the Stockholm International Peace Research Institute (SIPRI), worldwide military expenditures have been growing annually for the past 15 years, and between 15 and 20 major armed conflicts--yes, wars--are in progress as you read this. All told, upward of 175 million people died in war-related violence during the 20th century, plus another eight million because of conflicts among individuals. Even so, according to a weighty new book, The Better Angels of Our Nature: Why Violence Has Declined (Viking Adult, 2011), by Harvard University psychologist Steven Pinker , the "better angels" of human nature have actually brought about a dramatic reduction in violence during the past few millennia.

According to the Stockholm International Peace Research Institute (SIPRI), worldwide military expenditures have been growing annually for the past 15 years, and between 15 and 20 major armed conflicts--yes, wars--are in progress as you read this. All told, upward of 175 million people died in war-related violence during the 20th century, plus another eight million because of conflicts among individuals. Even so, according to a weighty new book, The Better Angels of Our Nature: Why Violence Has Declined (Viking Adult, 2011), by Harvard University psychologist Steven Pinker , the "better angels" of human nature have actually brought about a dramatic reduction in violence during the past few millennia.

By Amanda Mascarelli of Nature magazine Three coastal-restoration projects intended to rescue Louisiana's rapidly shrinking wetlands have failed to restore marsh during the past two decades. Instead, the schemes -- which involve diverting fresh water from the Mississippi River in the hope of carrying sediment to marshes and aiding plant life -- have made these regions more vulnerable to hurricanes, according to the authors of a study published by Geophysical Research Letters . Louisiana's coastal wetlands are up against a host of natural and anthropogenic factors

The people of the world get 75 percent of their sustenance--either directly, or indirectly as meat--from four crops: maize (corn), wheat, rice and soybeans. The world's rising population--now predicted by the United Nations to reach 10.1 billion by century's end --has been fed thanks to rising yields of all four of these crops during the past century.

CAMBRIDGE, Mass.--The last symposium in MIT's 150-day celebration of its 150th anniversary (who ever said that geeks don't like ritual?) is devoted to the question: "Whatever happened to AI?" Of course, that is a particularly appropriate self-introspection for MIT because a lot of artificial intelligence action occurred there during the past 50 years.

The number of Adelie and chinstrap penguins living on the Antarctic Peninsula has plummeted by more than half during the past 30 years. Scientists once believed that climate change would create a stark contrast between the two species.

In the March issue of Scientific American Carl Schoonover, author of Portraits of the Mind: Visualizing the Brain from Antiquity to the 21st Century , describes a new computer-modeling technique that allows researchers to zoom in on the smallest components of the active brain in 3-D. To accompany the story, we've collected images from his recent book , which describes the tools that scientists have used to observe the nervous system from the second century to the present.