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Breakthrough in light sources for new quantum technology

One of the most promising technologies for future quantum circuits are photonic circuits, i.e. circuits based on light (photons) instead of electrons (electronic circuits). First, it is necessary to create a stream of single photons and control their direction. Researchers have now succeeded in creating a steady stream of photons emitted one at a time and in a particular direction.
 
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Posted by on August 29, 2014 in Blog

 

Snails tell of the rise and fall of the Tibetan Plateau

The rise of the Tibetan plateau -- the largest topographic anomaly above sea level on Earth -- is important for both its profound effect on climate and its reflection of continental dynamics. Scientists have now employed a cutting-edge geochemical tool -- "clumped" isotope thermometry -- using modern and fossil snail shells to investigate the uplift history of the Zhada basin in southwestern Tibet.
 
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Posted by on August 29, 2014 in Blog

 

Prehistoric migrations: DNA study unravels the settlement history of the New World Arctic

A new DNA study unravels the settlement history of the New World Arctic. We know people have lived in the New World Arctic for about 5,000 years. Archaeological evidence clearly shows that a variety of cultures survived the harsh climate in Alaska, Canada and Greenland for thousands of years. Despite this, there are several unanswered questions about these people.
 
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Posted by on August 28, 2014 in Blog

 

Mystery solved: ‘Sailing stones’ of Death Valley seen in action for the first time

Racetrack Playa is home to an enduring Death Valley mystery. Littered across the surface of this dry lake, also called a "playa," are hundreds of rocks -- some weighing as much as 320 kilograms (700 pounds) -- that seem to have been dragged across the ground, leaving synchronized trails that can stretch for hundreds of meters.
 
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Posted by on August 28, 2014 in Blog

 

Marine protected areas inadequate for protecting fish and ocean ecology, study finds

A new study reports that an expansion of marine protected areas is needed to protect fish species that perform key ecological functions. According to investigators, previous efforts at protecting fish have focused on saving the largest numbers of species, often at the expense of those species that provide key and difficult-to-replace ecological functions.
 
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Posted by on August 28, 2014 in Blog

 

A new, tunable device for spintronics

An international team of scientists has developed a tunable spin-charge converter made of GaAs. Spin-charge converters are important devices in spintronics, an electronic which is not only based on the charge of electrons but also on their spin and the spin-related magnetism. Spin-charge converters enable the transformation of electric into magnetic signals and vice versa.
 
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Posted by on August 28, 2014 in Blog

 

Global warming pioneer calls for carbon dioxide to be taken from atmosphere and stored underground

Wally Broeker, the first person to alert the world to global warming, has called for atmospheric carbon dioxide to be captured and stored underground.
 
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Posted by on August 28, 2014 in Blog

 

Ancient metal workers were not slaves but highly regarded craftsmen

In the course of ongoing excavations at Timna Valley, archaeologists analyzed remnants of food eaten by copper smelters 3,000 years ago. This analysis indicates that the laborers operating the furnaces were in fact skilled craftsmen who enjoyed high social status and adulation. They believe their discovery may have ramifications for similar sites across the region.
 
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Posted by on August 28, 2014 in Blog

 

Quantum physics enables revolutionary imaging method

Researchers have developed a fundamentally new quantum imaging technique with strikingly counter-intuitive features. For the first time, an image has been obtained without ever detecting the light that was used to illuminate the imaged object, while the light revealing the image never touches the imaged object.
 
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Posted by on August 28, 2014 in Blog

 

Study shows where on the planet new roads should and should not go

Researchers have created a ‘large-scale zoning plan’ that aims to limit the environmental costs of road expansion while maximizing its benefits for human development.
 
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Posted by on August 28, 2014 in Blog