While the developed world gets all of the attention for obesity, the developing world is only different in one sense; they retain more severely undernourished people even while obese and overweight people in those countries are gaining weight.

Unless people get obese equally, that growing divide may force governments in the developing world to simultaneously care for starving people while treating health problems associated with obesity, including diabetes and heart disease.

If you are going to use 'entanglement' to teleport quantum information on a practical scale, it needs to be worked out how entanglement could be 'recycled' to increase the efficiency of these connections.

Writing in 
Physical Review Letters , a group has done just that - mathematically. They have
also devised a generalized form of teleportation, which allows for a wide variety of potential applications in quantum physics.

For two decades, carbon dioxide was touted as the silver bullet for halting climate change.  What about methane, what about NO2, and what about soot?

Soot, that black carbon that causes smoggy skies (and has sent Beijing's Pollution Index right off the charts) is the number two contributor to global warming, second to carbon dioxide, according to a four-year assessment by an international panel that is not the Intergovernmental Panel on Climate Change. 

The new study concludes that black carbon, the soot particles in smoke and smog, contributes about twice as much to global warming as previously estimated by the 2007 IPCC report.

Want concerns about transmission of disease and antibiotic resistance to get attention?  Show that pretty tropical fish are at risk.

The $15 billion ornamental fish industry has sounded the alarm about antibiotic resistance because of concerns that treatments for fish diseases may not work when needed – and creating yet another mechanism for exposing humans to antibiotic-resistant bacteria. The risk to humans is minor unless they frequently work with fish or have compromised immune systems, researchers said, but more serious is the risk to this industry, which has grown significantly in recent years, and is now a $900 million annual business just in the United States.

Researchers have discovered a way to stimulate the brain's natural defense mechanisms in people with Alzheimer's disease. 

One of the main characteristics of Alzheimer's disease is the production in the brain of the toxic molecule amyloid beta. Microglial cells, the nervous system's defenders, are unable to eliminate this substance, which forms deposits called senile plaques. 

Scientists have established that the majority of ozone-depleting iodine oxide observed over the remote ocean comes from a previously unknown marine source - the principal source of iodine oxide can be explained by emissions of hypoiodous acid (HOI), a gas not yet considered as being released from the ocean, along with a contribution from molecular iodine (I2).

Since the 1970s when methyl iodide (CH3I) was discovered as ubiquitous in the ocean, the presence of iodine in the atmosphere has been understood to arise mainly from emissions of organic compounds from phytoplankton -- microscopic marine plants.