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The number of deaths from traffic accidents in the United States jumped 8.1 percent in the first half of 2015 [url=http://www.cheapnfljerseysredskin.com/jonathan-allen/]Jonathan Allen Hat[/url] , suggesting smartphones and other driving distractions could be making America's roadways more dangerous, officials said on Tuesday. Preliminary government statistics, released during a Thanksgiving holiday week known for heavy traffic congestion, showed deaths rising to 16,225 in the January-June period at a rate more than double an increase in overall driving spawned by falling gasoline prices and a growing economy. "The increase in smartphones in our hands is so significant, there's no question that has to play some role. But we don't have enough information yet to determine how big a role," said Mark Rosekind, who heads the National Highway Traffic Safety Administration, the federal government's auto safety watchdog. The jump in 2015 fatalities follows a decline in annual traffic deaths to 32,675 last year, for a record low of 1.07 deaths per million vehicle miles traveled, according to NHTSA statistics. The 2014 data included 21,022 passenger vehicle deaths, the lowest since record-keeping began in 1975. The increase in the first half of 2015 was the biggest six-month jump in traffic deaths reported since 1977, according to statistics. But officials cautioned that semi-annual results can be subject to major revisions and noted that a comparable 7.9 percent increase in early 2012 led to a 4 percent rise for that year as a whole. Officials said it was too early to identify contributing factors. But Rosekind told reporters that officials are looking at likely causes including distracted driving and the possibility lower gas prices have encouraged more driving among "risky drivers" such as teen-agers. Rosekind also criticized an absence of effective state laws that prohibit hand-held smartphones by drivers or require the use of seatbelts and motorcycle helmets. The auto safety agency expects to unveil a program next year to target $500 million in federal safety grants at human factors that are responsible for 94 percent of motor vehicle crashes. " 　　Photo taken on Nov. 2, 2017 shows Chang Jin, chief scientist of Dark Matter Particle Explorer (DAMPE) and vice director of the Purple Mountain Observatory (PMO) of the Chinese Academy of Sciences (CAS), introducing the science achievement of DAMPE Satellite, "Wukong", at the PMO in Nanjing, capital of east China's Jiangsu Province. BEIJING, Nov. 30 (Xinhua) -- China's Dark Matter Particle Explorer (DAMPE) has detected unexpected and mysterious signals in its measurement of high-energy cosmic rays, which might bring scientists a step closer to shedding light on invisible dark matter. The satellite, also called Wukong, or Monkey King, has measured more than 3.5 billion cosmic ray particles with the highest energy up to 100 tera-electron-volts (TeV for short, corresponding to 1 trillion times the energy of visible light), including 20 million electrons and positrons, with unprecedentedly high energy resolution. ""DAMPE has opened a new window for observing the high-energy universe, unveiling new physical phenomena beyond our current understanding,"" said Chang Jin, chief scientist of DAMPE and vice director of the Purple Mountain Observatory of the Chinese Academy of Sciences (CAS). The initial detection results were published in the latest issue of the academic journal, Nature. ""This is the first time a space experiment has reported a detailed and precise electron and positron spectrum up to about 5 TeV. In this energy range, we found some unexpected and interesting features. We have detected a spectral break at 0.9 TeV and a possible spike at 1.4 TeV,"" said Chang. Precise measurement of cosmic rays, especially at the very high energy range, is important for scientists to look for traces of dark matter annihilation or decay, as well as to understand the most energetic astrophysical phenomena in the universe, such as pulsars, active galaxy nuclei and supernova explosions. ""Our data may inspire some new ideas in particle physics and astrophysics,"" said Chang. 　　Photo taken on Nov. 27, 2017 shows Chang Jin, chief scientist of Dark Matter Particle Explorer (DAMPE) and vice director of the Purple Mountain Observatory of the Chinese Academy of Sciences (CAS), introducing the findings made by DAMPE Satellite, "Wukong", at Chinese Academy of Sciences (CAS) in Beijing, capital of China. Dark matter, which cannot be seen or touched, is one of the great mysteries of science. Scientists calculate that normal matter, such as galaxies, stars, trees, rocks and atoms, accounts for only about 5 percent of the universe. However, about 26.8 percent of the universe is dark matter and 68.3 percent dark energy. China sent DAMPE into an orbit of about 500 kilometers above the earth on December 17, 2015, to look for evidence of the annihilation or decay of dark matter particles in space. DAMPE has the widest energy range coverage and the highest energy resolution of all the dark matter probes currently in space. Based on the satellite's data, scientists drew the cosmic ray electron and positron spectrum. To their surprise, scientists found a break at around 0.9 TeV and a strange spike at around 1.4 TeV on the spectrum. ""We never expected such signals,"" Chang said. ""The spike might indicate that there exists a kind of unknown particle with a mass of about 1.4 TeV,"" said Chang. 　　Photo taken on Dec. 24, 2015 shows scientists of the National Space Science Center under the Chinese Academy of Sciences (CAS), work with the Dark Matter Particle Explorer (DAMPE) Satellite, "Wukong", at the science mission hall of the center in Beijing, capital of China. ""All the 61 elementary particles predicted by the standard model of particle physics have been found. Dark matter particles ar. 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