ScienceDaily: Most Popular News

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• To hear without being heard: First nonreciprocal acoustic circulator created
• Dinosaur fossils from China help researchers describe new 'Titan'
• Slow reaction time linked with early death
• Deaths attributed directly to climate change cast pall over penguins
• Breakthrough in rechargeable batteries: New twist to sodium-ion battery technology
• Neanderthal lineages excavated from modern human genomes
• Active supermassive black holes revealed in merging galaxies
• Scientists find genetic mechanism linking aging to specific diets
• Solving a 30-year-old problem in massive star formation
• Electrical generator uses bacterial spores to harness power of evaporating water
• Picture of how our climate is affected by greenhouse gases is a 'cloudy' one

To hear without being heard: First nonreciprocal acoustic circulator created Posted: 30 Jan 2014 11:13 AM PST Scientists have built the first-ever nonreciprocal circulator for sound that is able to break sound wave reciprocity. The device is a 'one-way road for sound' that transmits acoustic waves in one direction but blocks them in the other. With this device, you can listen without being heard.

Dinosaur fossils from China help researchers describe new 'Titan' Posted: 29 Jan 2014 03:48 PM PST Paleontologists have characterized a new dinosaur based on fossil remains found in northwestern China. The species, a plant-eating sauropod named Yongjinglong datangi, roamed during the Early Cretaceous period, more than 100 million years ago. This sauropod belonged to a group known as Titanosauria, members of which were among the largest living creatures to ever walk the earth.

Slow reaction time linked with early death Posted: 29 Jan 2014 03:48 PM PST Having a slow reaction time in midlife increases risk of having died 15 years later, according to new research. Researchers looked at data from more than 5,000 participants, over a 15 year period. A total of 378 (7.4 percent) people in the sample died, but those with slower reaction times were 25 percent more likely to have died (from any cause) compared to those with average reaction times.

Deaths attributed directly to climate change cast pall over penguins Posted: 29 Jan 2014 03:48 PM PST Climate change is killing penguin chicks from the world's largest colony of Magellanic penguins, not just indirectly -- by depriving them of food, as has been repeatedly documented for these and other seabirds -- but directly as a result of drenching rainstorms and, at other times, heat, according to new finding.

Breakthrough in rechargeable batteries: New twist to sodium-ion battery technology Posted: 29 Jan 2014 01:46 PM PST Engineers have made a breakthrough in rechargeable battery applications. They have demonstrated that a composite paper -- made of interleaved molybdenum disulfide and graphene nanosheets -- can be both an active material to efficiently store sodium atoms and a flexible current collector. The newly developed composite paper can be used as a negative electrode in sodium-ion batteries.

Neanderthal lineages excavated from modern human genomes Posted: 29 Jan 2014 10:49 AM PST A substantial fraction of the Neanderthal genome persists in modern human populations. A new approach for analyzing whole-genome sequencing data from 665 people from Europe and East Asia shows that more than 20 percent of the Neanderthal genome survives in the DNA of this contemporary group. Significant amounts of population-level DNA sequences might be obtained from extinct groups even in the absence of fossilized remains, because these archaic sequences might have been inherited by other individuals from whom scientists can gather genomic data.

Active supermassive black holes revealed in merging galaxies Posted: 28 Jan 2014 06:43 AM PST Astronomers have conducted infrared observations of luminous, gas-rich, merging galaxies to study active, mass-accreting supermassive black holes (SMBHs). They found that at least one SMBH almost always becomes active and luminous by accreting a large amount of material.

Scientists find genetic mechanism linking aging to specific diets Posted: 27 Jan 2014 11:18 AM PST In new research published, scientists identify a collection of genes that allow an organism to adapt to different diets and show that without them, even minor tweaks to diet can cause premature aging and death.

Solving a 30-year-old problem in massive star formation Posted: 27 Jan 2014 11:17 AM PST Astrophysicists have found evidence strongly supporting a solution to a long-standing puzzle about the birth of some of the most massive stars in the universe. Young massive stars shine brightly in the ultraviolet, heating the gas around them, and it has long been a mystery why the hot gas doesn't explode outwards. Now, observations have confirmed predications that as the gas cloud collapses, it forms dense filamentary structures that absorb the star's ultraviolet radiation.

Electrical generator uses bacterial spores to harness power of evaporating water Posted: 27 Jan 2014 07:12 AM PST A new type of electrical generator uses bacterial spores to harness the untapped power of evaporating water, according to new research. Its developers foresee electrical generators driven by changes in humidity from sun-warmed ponds and harbors.

Picture of how our climate is affected by greenhouse gases is a 'cloudy' one Posted: 26 Jan 2014 10:46 AM PST The warming effect of human-induced greenhouse gases is a given, but to what extent can we predict its future influence? That is an issue on which science is making progress, but the answers are still far from exact, say researchers.

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