ScienceDaily: Top Science News

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• Simple two-drug combination proves effective in reducing risk of stroke
• Social animals have more social smarts
• Human activities threaten Sumatran tiger population
• First transiting planets in a star cluster discovered
• Comparing genomes of wild and domestic tomato
• Solar power heads in a new direction: Thinner
• A stepping-stone for oxygen on Earth
• New brain imaging study provides support for the notion of food addiction
• DNA found outside genes plays largely unknown, potentially vital roles: Thousands of previously unknown RNA molecules identified
• Getting the carbon out of emissions
• A 700,000-year-old horse gets its genome sequenced
• Location of upwelling in Earth's mantle discovered to be stable
• Survivor of stellar collision is new type of pulsating star
• Chimps or humans: Who's the better baseball pitcher?
• Climate tug of war disrupting Australian atmospheric circulation patterns
• Astronomers spy on galaxies in the raw
• How men and women cooperate
• Sea level along Maryland's shorelines could rise two feet by 2050
• Realistic robot carp created: First robot fish with autonomous 3-D movement in Asia

Simple two-drug combination proves effective in reducing risk of stroke Posted: 26 Jun 2013 03:40 PM PDT Results of a Phase III clinical trial showed that a simple drug regimen of two anti-clotting drugs -- clopidogrel and aspirin -- lowered the risk of stroke by almost one-third, compared to the standard therapy of aspirin alone, when given to patients who had minor or transient stroke symptoms to prevent subsequent attacks.

Social animals have more social smarts Posted: 26 Jun 2013 03:40 PM PDT Lemurs from species that hang out in big tribes are more likely to steal food behind your back instead of in front of your face. This behavior suggests that primates who live in larger social groups tend to have more "social intelligence," a new study shows.

Human activities threaten Sumatran tiger population Posted: 26 Jun 2013 03:39 PM PDT Wildlife researchers have found that tigers in central Sumatra live at very low densities, lower than previously believed.

First transiting planets in a star cluster discovered Posted: 26 Jun 2013 01:28 PM PDT All stars begin their lives in groups. Most stars are born in small groups that quickly fall apart. Others form in huge, dense swarms, where stars jostle with thousands of neighbors while strong radiation and harsh stellar winds scour interstellar space, stripping planet-forming materials from nearby stars. It would thus seem an unlikely place to find alien worlds. Yet 3,000 light-years from Earth, in the star cluster NGC 6811, astronomers have found two planets smaller than Neptune orbiting sun-like stars.

Comparing genomes of wild and domestic tomato Posted: 26 Jun 2013 12:39 PM PDT You say tomato, I say comparative transcriptomics. Researchers in the US, Europe and Japan have produced the first comparison of both the DNA sequences and which genes are active, or being transcribed, between the domestic tomato and its wild cousins.

Solar power heads in a new direction: Thinner Posted: 26 Jun 2013 12:39 PM PDT Atom-thick photovoltaic sheets could pack hundreds of times more power per weight than conventional solar cells.

A stepping-stone for oxygen on Earth Posted: 26 Jun 2013 12:39 PM PDT For most terrestrial life on Earth, oxygen is necessary for survival. But the planet's atmosphere did not always contain this life-sustaining substance, and one of science's greatest mysteries is how and when oxygenic photosynthesis first began. Now, geobiologists have found evidence of a precursor photosystem involving manganese that predates cyanobacteria, the first group of organisms to release oxygen into the environment via photosynthesis.

New brain imaging study provides support for the notion of food addiction Posted: 26 Jun 2013 12:39 PM PDT Consuming highly processed carbohydrates can cause excess hunger and stimulate brain regions involved in reward and cravings, according to a new study. These findings suggest that limiting these "high-glycemic index" foods could help obese individuals avoid overeating.

DNA found outside genes plays largely unknown, potentially vital roles: Thousands of previously unknown RNA molecules identified Posted: 26 Jun 2013 11:31 AM PDT A new study highlights the potential importance of the vast majority of human DNA that lies outside of genes within the cell.

Getting the carbon out of emissions Posted: 26 Jun 2013 11:31 AM PDT Researchers propose a new method to remove carbon from emissions that could be more efficient than previous systems and easier to retrofit in existing power plants.

A 700,000-year-old horse gets its genome sequenced Posted: 26 Jun 2013 11:29 AM PDT Scientists have just sequenced the oldest genome from a prehistoric creature. They have done so by sequencing and analyzing short pieces of DNA molecules preserved in bone-remnants from a horse that had been kept frozen for the last 700,000 years in the permafrost of Yukon, Canada.

Location of upwelling in Earth's mantle discovered to be stable Posted: 26 Jun 2013 11:29 AM PDT A new study shows that large-scale upwelling within Earth's mantle mostly occurs in only two places: Beneath Africa and the Central Pacific. These upwelling locations have remained remarkably stable over geologic time, despite dramatic reconfigurations of tectonic plate motions and continental locations on the Earth's surface. The study describes a plate tectonic "quadrupole," which defines two points of "net convergence" and two points of "net divergence" of tectonic plate motions.

Survivor of stellar collision is new type of pulsating star Posted: 26 Jun 2013 11:28 AM PDT Astronomers have observed the remnant of a stellar collision and discovered that its brightness varies in a way not seen before on this rare type of star. By analyzing the patterns in these brightness variations, astronomers will learn what really happens when stars collide.

Chimps or humans: Who's the better baseball pitcher? Posted: 26 Jun 2013 11:27 AM PDT Scientists collected motion data from baseball players to uncover why humans are such good throwers. Little leaguers and professional baseball players alike have our extinct ancestors to thank for their success on the mound, shows a new study. Of course, the ability to throw fast and accurately did not evolve so our ancestors could play ball. Instead, the study proposes that this ability first evolved nearly 2 million years ago to aid in hunting. Humans are unique in their throwing ability, even when compared to our chimpanzee cousins.

Climate tug of war disrupting Australian atmospheric circulation patterns Posted: 26 Jun 2013 08:36 AM PDT Further evidence of climate change shifting atmospheric circulation in the southern Australian-New Zealand region has been identified in a new study.

Astronomers spy on galaxies in the raw Posted: 26 Jun 2013 08:36 AM PDT A radio telescope has detected the raw material for making the first stars in galaxies that formed when the Universe was just three billion years old -- less than a quarter of its current age.

How men and women cooperate Posted: 26 Jun 2013 08:36 AM PDT Cooperation is essential in any successful romantic relationship, but how men and women experience cooperation emotionally may be quite different, according to new research. While men tend to mirror their partners' emotions during moments of high mutual cooperation, women might actually have the opposite response, suggests a new study.

Sea level along Maryland's shorelines could rise two feet by 2050 Posted: 26 Jun 2013 08:35 AM PDT A new report on sea level rise recommends that the State of Maryland should plan for a rise in sea level of as much as 2 feet by 2050. The projections are based on an assessment of the latest climate change science and federal guidelines.

Realistic robot carp created: First robot fish with autonomous 3-D movement in Asia Posted: 26 Jun 2013 08:30 AM PDT Scientists have developed a robot fish that mimics the movements of a carp. This robot which is essentially an autonomous underwater vehicle (AUV) is ready for applications, as it can be programmed to perform specific functions, for example, for underwater archaeology such as exploring nooks and corners of wreckage -- or sunken city which are difficult for divers or traditional AUVs to access. Other applications include military activities, pipeline leakage detection, and the laying of communication cable.

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