Weddell seals have biological adaptations that allow them to dive deep--as much as of hundreds of meters--while hunting, but also an uncanny ability to find the breathing holes they need on the surface of the ice. Now, researchers supported by the National Science Foundation (NSF) believe they have figured out how they do it--by using the Earth's magnetic field as a natural GPS. "This animal, we think, may be highly evolved with an ability to navigate using magnetic sense in order to find ice holes some distance apart and get back to them safely," explained Randall Davis of the Department of Marine Biology at Texas A&M University. If the hypothesis turns out to be true, it would represent the first evidence of such a trait in a marine mammal.

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We all get far too much mail, especially from financial services companies.  Credit card companies alone send billions of pieces of paper mail each year, and most of that gets thrown right into the trash can.  Not only does this dynamic pose a threat from a fraud perspective – trash cans and mailboxes can be treasure troves for opportunistic fraudsters – but you have to figure the effect on the environment isn’t great either. Paper products aren’t as bad as most materials, according to North Carolina State University Professor Richard Venditti, because they’re renewable, recyclable and biodegradable and they motivate land owners to plant trees.  However, Venditti says, “inefficient use of paper does consume resources and have an impact on the environment.” While credit card direct mail is on the rise after hitting a two-year low in April 2012, long-term trends suggest a declining role for traditional paper mail in the years to come.  Not only are financial services companies increasingly offering paperless options to their account holders – even charging extra for paper statements, but they’re also learning how to better leverage digital means for marketing purposes.  These changes are largely based on the shifting preferences of the modern consumer as well as the overall technicalization of modern commerce – not some newfound corporate altruism – but does it really matter? 

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Noise pollution in the ocean is increasingly recognized as harmful to marine mammals, affecting their ability to communicate, find mates, and hunt for food. But what impact does noise have on invertebrates -- a critical segment of the food web? Very few studies have attempted to answer that question. The harder question to answer might be 'How do you measure hearing in ocean invertebrates'? A new study by researchers at Woods Hole Oceanographic Institution and their colleagues examined behavioral responses to sound by cuttlefish, a type of shell-less mollusk related to squid and octopi. The study is the first to identify the acoustic range and minimum sound sensitivity in these animals. Their findings, published in the Journal of Experimental Biology, can help decision makers and environmental managers better understand the impacts of noise in the ocean.

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Glaciers in China that are a critical source of water for drinking and irrigation in India are receding fast, according to a new comprehensive inventory. In the short term, retreating glaciers may release greater meltwater, “but it will be exhausted when glaciers disappear under a continuous warming,” says Liu Shiyin, who led the survey for the Cold and Arid Regions Environmental and Engineering Research Institute in Lanzhou.

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Scientists studying the distribution of four commercial and recreational fish stocks in Northeast U.S. waters have found that climate change can have major impacts on the distribution of fish, but the effects of fishing can be just as important and occur on a more immediate time scale. The four species studied– black sea bass, scup, summer flounder, and southern New England/Mid-Atlantic Bight winter flounder – have varied in abundance and have experienced heavy fishing pressure at times over the past 40 years. 

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Across the country this holiday season, families and friends will gather around fires in woodstoves or fireplaces. But how you build that fire – and what you burn – can have a significant impact on air quality and health, both inside your home and out.

Whether you’re using a woodstove, pellet stove, or your fireplace, seeing smoke from your chimney means your fire isn’t burning efficiently or cleanly as it could. 

Woodsmoke contains fine particles – also called fine particle pollution or PM2.5 -- which can harm the lungs, blood vessels and heart. People with heart, vascular or lung disease, and older adults and children are more at risk. 

Here are some simple tips for building cleaner-burning fires this holiday season:

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