ScienceDaily: Most Popular News

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• Timing is everything: How the brain links memories of sequential events
• Genome of longest-living cancer: 11,000-year-old living dog cancer reveals its origin, evolution
• One quarter of the world's cartilaginous fish, namely sharks and rays, face imminent extinction
• Nighttime smartphone use zaps workers' energy
• Bright star reveals new Neptune-size exoplanet
• Strontium atomic clock sets new records in both precision and stability
• Polar bear diet changes as sea ice melts
• Parental exposure to marijuana linked to drug addiction, compulsive behavior in unexposed progeny, rodent sudy finds
• Engineer converts yeast cells into 'sweet crude' biofuel
• Famine, not calcium absorption, may have driven evolution of milk tolerance in Europeans
• Space station MAXI-mizing our understanding of the universe

Timing is everything: How the brain links memories of sequential events Posted: 23 Jan 2014 11:19 AM PST Suppose you heard the sound of skidding tires, followed by a car crash. The next time you heard such a skid, you might cringe in fear, expecting a crash to follow -- suggesting that somehow, your brain had linked those two memories so that a fairly innocuous sound provokes dread. Scientists have now discovered how two neural circuits in the brain work together to control the formation of such time-linked memories.

Genome of longest-living cancer: 11,000-year-old living dog cancer reveals its origin, evolution Posted: 23 Jan 2014 11:17 AM PST A cancer normally lives and dies with a person, however this is not the case with a sexually transmitted cancer in dogs. In a new study, researchers have described the genome and evolution of this cancer that has continued living within the dog population for the past 11,000 years.

One quarter of the world's cartilaginous fish, namely sharks and rays, face imminent extinction Posted: 22 Jan 2014 05:23 PM PST One quarter of the world's cartilaginous fish, namely sharks and rays, face extinction within the next few decades, according to the first study to systematically and globally assess their fate.

Nighttime smartphone use zaps workers' energy Posted: 22 Jan 2014 02:06 PM PST Using a smartphone to cram in more work at night results in less work the next day, indicates new research.

Bright star reveals new Neptune-size exoplanet Posted: 22 Jan 2014 10:40 AM PST A team of astronomers has discovered a new exoplanet, christened Kepler-410A b. The planet is about the size of Neptune and orbits the brightest star in a double star system 425 light years from Earth.

Strontium atomic clock sets new records in both precision and stability Posted: 22 Jan 2014 10:38 AM PST Heralding a new age of terrific timekeeping, physicists have unveiled an experimental strontium atomic clock that has set new world records for both precision and stability -- key metrics for the performance of a clock.

Polar bear diet changes as sea ice melts Posted: 22 Jan 2014 07:40 AM PST At least some polar bears in the western Hudson Bay population are using flexible foraging strategies while on land, such as prey-switching and eating a mixed diet of plants and animals, as they survive in their rapidly changing environment, new research suggests.

Parental exposure to marijuana linked to drug addiction, compulsive behavior in unexposed progeny, rodent sudy finds Posted: 22 Jan 2014 07:25 AM PST Teen marijuana use may have repercussions in unexposed progeny. This rodent study found that parental use of marijuana/THC was linked to molecular and neurobiological disturbances and increased motivation to get drugs.

Engineer converts yeast cells into 'sweet crude' biofuel Posted: 22 Jan 2014 06:19 AM PST A chemical engineer has developed a new source of renewable energy -- a yeast cell-based platform for producing biodiesel, which he has dubbed "sweet crude." The key to this platform is regular table sugar. It has the potential for industry scalability without the environmental costs of other biofuels.

Famine, not calcium absorption, may have driven evolution of milk tolerance in Europeans Posted: 22 Jan 2014 06:18 AM PST Ancient DNA from early Iberian farmers shows that the wideheld evolutionary hypothesis of calcium absorption was not the only reason Europeans evolved milk tolerance. In the West, people take milk drinking for granted because most people of European descent are able to produce the enzyme lactase in adulthood and so digest the milk sugar lactose. However, this is not the norm in much of the world, and was not the norm for our Stone Age ancestors.

Space station MAXI-mizing our understanding of the universe Posted: 16 Jan 2014 08:33 AM PST The Monitor of All-sky X-ray Image (MAXI) collects data that help researchers discover, study and understand the physics behind the lifecycle of our universe. MAXI was key in two recent publications sharing results that make strides in advancing astrophysics.

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