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Sunday, October 19, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

NASA spacecraft provides new information about sun's atmosphere

Posted: 16 Oct 2014 03:54 PM PDT

NASA's Interface Region Imaging Spectrograph (IRIS) has provided scientists with five new findings into how the sun's atmosphere, or corona, is heated far hotter than its surface, what causes the sun's constant outflow of particles called the solar wind, and what mechanisms accelerate particles that power solar flares.

Wobbling of a Saturn moon hints at what lies beneath

Posted: 16 Oct 2014 11:36 AM PDT

Using instruments aboard the Cassini spacecraft to measure the wobbles of Mimas, the closest of Saturn's regular moons, an astronomer has inferred that this small moon's icy surface cloaks either a rugby ball-shaped rocky core or a sloshing sub-surface ocean.

Evidence for huge mountains that fed early life discovered

Posted: 16 Oct 2014 07:03 AM PDT

Scientists have found evidence for a huge mountain range that existed in the supercontinent of Gondwana some 600 million years ago. It ran from modern west Africa to northeast Brazil, and as it eroded it fed the oceans with nutrients that fueled an explosion of early life on Earth.

Magnetic mirrors enable new technologies by reflecting light in uncanny ways

Posted: 16 Oct 2014 07:03 AM PDT

Scientists have demonstrated, for the first time, a new type of mirror that forgoes a familiar shiny metallic surface and instead reflects infrared light by using an unusual magnetic property of a non-metallic metamaterial. Using nanoscale antennas, researchers are able to capture and harness electromagnetic radiation in ways that have tantalizing potential in new classes of chemical sensors, solar cells, lasers, and other optoelectronic devices.

New way to lose weight: Scientists stimulate brown fat to burn more energy from food

Posted: 16 Oct 2014 05:56 AM PDT

The number of overweight persons is greatly increasing worldwide - and as a result is the risk of suffering a heart attack, stroke, diabetes or Alzheimer's disease. For this reason, many people dream of an efficient method for losing weight. Scientists have now come one step closer to this goal. The scientists discovered a new way to stimulate brown fat and thus burn energy from food: The body's own adenosine activates brown fat and "browns" white fat.

Inexplicable signal from unseen universe provides tantalizing clue about one of astronomy's greatest secrets -- dark matter

Posted: 16 Oct 2014 05:54 AM PDT

The first potential indication of direct detection of dark matter -- something that has been a mystery in physics for over 30 years -- has been attained. Astronomers found what appears to be a signature of 'axions', predicted 'dark matter' particle candidates.

Gradual weight loss no better than rapid weight loss for long-term weight control

Posted: 15 Oct 2014 04:08 PM PDT

Contrary to current dietary recommendations, slow and steady weight loss does not reduce the amount or rate of weight regain compared with losing weight quickly, new research has found.

Getting to know super-Earths: Using Hubble to study mysterious exoplanet

Posted: 15 Oct 2014 12:25 PM PDT

Results from NASA's Kepler mission have indicated that the most common planets in the galaxy are super-Earths -- those that are bigger than Earth but smaller than Neptune. We have no examples of these planets in our own solar system, so astronomers are using space telescopes to try to find out more about these worlds. Most recently they used Hubble to study the planet HD 97658b, in the constellation Leo.

Energy drinks may pose danger to public health, researchers warn

Posted: 14 Oct 2014 02:07 PM PDT

Increased consumption of energy drinks may pose danger to public health, especially among young people, warns a team of researchers. Energy drinks are non-alcoholic beverages that contain caffeine, vitamins, and sometimes other ingredients such as taurine, ginseng, and guarana. They are typically marketed as boosting energy and increasing physical and mental performance.

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