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Swimming sea life stirs the oceans Wired Science Share    
A growing body of evidence suggests that microscopic animals are responsible for much of the mixing that distributes oxygen and nutrients in the oceans. Two research groups have now added weight to that theory. The researchers examined tracer beads suspended in fluid to record the swimming motions of two species of plankton. The work helps to gauge the cumulative effect of microscopic swimming on macroscopic mixing in large bodies of water. Read the associated APS Physics Viewpoint. More Phonons tunnel across the vacuum Physics World Share
Heat can be conducted across a nanometer-sized vacuum gap - something that was deemed impossible until now. So say researchers at the Air Force Research Laboratory in Ohio who have found that the heat is transferred via an effect called "phonon tunneling" in which quantized molecular vibrations, called phonons, appear to traverse the forbidden zone. The finding could be important for improving thermoelectric devices and for future nanoscale electronic circuits. Read the associated Physical Review Focus article. More
Flexible LEDs to boost biomedicine Nature News Share
Bendy, stretchy and bio-compatible arrays of light-emitting diodes (LEDs) and photodetectors that can be implanted under the skin are boosting prospects of using light inside the body to activate drugs or monitor medical conditions. More Getting GPS out of a jam Scientific American Share
The Global Positioning System we rely on for guiding nuclear missiles and steering tourists to Mount Rushmore, has become a ripe target for enemy attack. In response, US scientists are developing gadgets that can track an object’s position in the event GPS signals are cut off. More
Ancient, massive galaxy cluster harbors 800 trillion suns Popular Science Share
Now that scientists are done making a map of the cosmic microwave background, they can use that detailed map to find hidden treasures from the ancient universe. Using the South Pole Telescope, they've just found a mother lode: the biggest galaxy cluster ever seen, harboring about 800 trillion suns inside hundreds of galaxies. More Big bounce cosmos makes inflation a sure thing NewScientist Share
Is our universe a recycled version of an earlier cosmos? The idea, which replaces the big bang with a "big bounce", has received a boost: this vision of the birth of the universe can explain why a subsequent process, called inflation, occurred. More
APS responds to climate-change accusations Physics World Share
The APS has issued a strongly worded statement in response to a published resignation letter from a prominent member of the society. Read the APS press release. More LHC chief: Finding nothing 'would be interesting' NewScientist Share
As things heat up at the Large Hadron Collider, the lab's director of research and scientific computing, Sergio Bertolucci, tells of what lies ahead for the world's largest atom smasher. More
Cracks in the Universe Knox News Share
Physicists are hot on the trail of one of strangest theorized structures in the universe. A team of researchers have announced what they think are the first indirect observations of ancient cosmic strings, bizarre objects thought to have contributed to the arrangement of objects throughout the universe. Read the associated Physical Review Letters article. More Bacteria can walk on 'legs' MSNBC Share
Bacteria have legs? That suggestion seemed surprising to Gerard Wong, a bioengineering professor at the University of California at Los Angeles, when his students told him they were seeing some strange behavior in movies of the microbes. Read the associated APS March Meeting abstract. More |
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