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Showing posts from January 26, 2017

U.S. scientists create metallic hydrogen, a possible superconductor, ending quest

By Julie Steenhuysen CHICAGO (Reuters) - U.S. scientists have succeeded in squeezing hydrogen so intensely that it has turned into a metal, creating an entirely new material that might be used as a highly efficient electricity conductor at room temperatures. The discovery, published in the journal Science on Thursday, provides the first confirmation of a theory proposed in 1935 by physicists Hillard Bell Huntington and Eugene Wigner that hydrogen, normally a gas, could occur in a metallic state if exposed to extreme pressure. Several teams have been racing to develop metallic hydrogen, which is highly prized because of its potential as a superconductor, a material that is extremely efficient at conducting electricity.


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U.S. scientists create metallic hydrogen, a possible superconductor, ending quest

By Julie Steenhuysen CHICAGO (Reuters) - U.S. scientists have succeeded in squeezing hydrogen so intensely that it has turned into a metal, creating an entirely new material that might be used as a highly efficient electricity conductor at room temperatures. The discovery, published in the journal Science on Thursday, provides the first confirmation of a theory proposed in 1935 by physicists Hillard Bell Huntington and Eugene Wigner that hydrogen, normally a gas, could occur in a metallic state if exposed to extreme pressure. Several teams have been racing to develop metallic hydrogen, which is highly prized because of its potential as a superconductor, a material that is extremely efficient at conducting electricity.


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U.S. scientists create metallic hydrogen, a possible superconductor, ending quest

By Julie Steenhuysen CHICAGO (Reuters) - U.S. scientists have succeeded in squeezing hydrogen so intensely that it has turned into a metal, creating an entirely new material that might be used as a highly efficient electricity conductor at room temperatures. The discovery, published in the journal Science on Thursday, provides the first confirmation of a theory proposed in 1935 by physicists Hillard Bell Huntington and Eugene Wigner that hydrogen, normally a gas, could occur in a metallic state if exposed to extreme pressure. ...


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Nuclear 'Doomsday Clock' ticks closest to midnight in 64 years

By John Clarke WASHINGTON (Reuters) - Atomic scientists reset their symbolic "Doomsday Clock" to its closest time to midnight in 64 years on Thursday, saying the world was closer to catastrophe due to threats such as nuclear weapons, climate change and Donald Trump's election as U.S. president. The timepiece, devised by the Chicago-based Bulletin of the Atomic Scientists and displayed on its website, is widely viewed as an indicator of the world's vulnerability to disaster. "The Doomsday Clock is closer to midnight than it's ever been in the lifetime of almost everyone in this room," Lawrence Krauss, the bulletin's chair, told a news conference in Washington.


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Scientists take first steps to growing human organs in pigs

NEW YORK (AP) — Scientists have grown human cells inside pig embryos, a very early step toward the goal of growing livers and other human organs inside animals to transplant into people.


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Meditation Really Does Lower Body's Stress Signals

Meditation may help the body respond to stressful situations, according to a new study that took a rigorous look at how the practice affects people's physiology when they're under pressure. In the study, people with anxiety disorder took an eight-week course in mindfulness meditation, in which they learned to focus on the present moment and accept difficult thoughts or feelings. The researchers found that, after completing the course, these participants showed reduced levels of stress hormones and markers of inflammation during a stressful event, compared with how their bodies reacted before the course.


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Log On, Sleep Better? Online Therapy for Insomnia Shows Promise

For people with insomnia, help falling asleep may soon be available online: A recent clinical trial found that a web-based course of treatment for insomnia was effective at helping people get more sleep. Compared with people in the study who received no therapy, those who participated in the online treatment group fell asleep faster, woke up fewer times during the night and reported less severe insomnia after completing the treatment, according to the study. The type of therapy, called cognitive behavioral therapy for insomnia (or CBT-I), is considered to be a "first-line" recommendation for people with chronic insomnia — that is, insomnia that lasts longer than one month.


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Fake News 'Vaccine' Could Stop Spread of False Information

It might be possible to prevent people from falling prey to fake news by "inoculating" them with warnings that false information is out there, new research suggests. In an online study, scientists warned people about the type of misinformation they might encounter in a subsequent statement. This warning prevented the false information from taking hold in a way that wasn't possible by simply providing people with the correct facts after giving them a false statement, the researchers reported Jan. 23 in the journal Global Challenges.


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NASA's Aurora-Watching Rocket Campaign Blasts Off

NASA is known for its awe-inspiring missions to explore the far reaches of the cosmos, but this month, the space agency is preparing for very different kinds of rocket launches: ones to explore the mysteries of Earth's auroras. Over three missions and five launches, NASA will launch rockets into the Earth's upper atmosphere to help scientists better understand the planet's magnetic environment. From auroras to solar winds, the rockets will examine what's known as near-Earth space, NASA researchers said.


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New Exosuit Fabric Could Boost Mobility in People with Disabilities

Knitting and weaving artificial muscles could help create soft exoskeletons that people with disabilities could wear under their clothes to help them walk, according to new research. Textile processing is one of humanity's oldest technologies, but in recent years there has been renewed interest in using it to create "smart" textiles that can do everything from harvest power from the environment to monitor our health. Now, Swedish researchers have created actuators — devices that convert energy into motion — from cellulose yarn coated with a polymer that reacts to electricity.


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British astronaut Peake to make second space flight

British astronaut Tim Peake is to return to the International Space Station to carry out more research, the government said on Thursday. The announcement was made at London's Science Museum, where the capsule which carried Peake on his previous 186-day 'Principia' mission to the space station was unveiled for display. "Tim Peake's Principia mission inspired a generation, and showed just how far science can take you," said business secretary Greg Clark.


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