In the sci-fi movie Armageddon, astronauts intercept a killer asteroid heading for Earth, saving mankind. NASA is taking the first step to develop the technology to do just that, by planning a mission to slightly alter an asteroid’s orbit. The mission will also serve as an initial test of a solar-electric propulsion system and other technologies essential for a manned […]
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Second-generation biofuel made from natural grass species challenges ethanol derived from maize crops as the US seeks to reduce its fossil fuel use. LONDON, January, 2016 – In tomorrow’s world, it won’t be just the corn on the great American plains that is as high as an elephant’s eye. It will be the elephant grass as well. To deliver on […]
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What is hail or a hailstone? Hail is a form of precipitation that occurs when updrafts in thunderstorms carry raindrops upward into extremely cold areas of the atmosphere where they freeze into balls of ice. Hail can damage aircraft, homes and cars, and can be deadly to livestock and people. How does hail form? Hailstones grow by colliding with supercooled […]
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We’ve heard a lot about the negative effects of climate change in the arctic and subarctic. But some Alaskans, like farmer Tim Meyers, are seeing warming temperatures as an opportunity. Now that potato harvest is underway at his Bethel farm, Meyers uses a giant potato washer, like a washing machine for root vegetables, to clean California white potatoes. They’re some […]
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Scientists have long suspected that waste dumped into the ocean would ultimately find its way into the seafood that ends up on dinner tables. A new study provides evidence that this is more than just a theory. After analyzing fish caught off the coasts of California and Indonesia and sold in local markets, researchers found 25 percent contained man-made debris. […]
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The ozone layer over the Arctic Circle developed a giant hole this winter, scientists say. Over the North Pole, 40 percent of the ozone layer has disappeared—a record seasonal loss. Ozone high in the atmosphere shields the Earth from harmful UV rays, and it fluctuates seasonally; usually about 25 percent of the Arctic’s ozone layer fades every winter. In the […]
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The US could reduce greenhouse gas emissions from electricity generation by 80% below 1990 levels within 15 years just by using renewable sources such as wind and solar energy, according to a former government research chief. The nation could do this using only technologies available right now, and by introducing a national grid system connected by high voltage direct current […]
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Global climate envoys agreed a landmark accord on Saturday, setting the course for a “historic” transformation of the world’s fossil fuel-driven economy within decades in a bid to arrest global warming. At the tail end of the hottest year on record and after four years of fraught U.N. talks often pitting the interests of rich nations against poor, imperiled island […]
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Scientists from the University of Delaware’s Bartol Research Institute in the Department of Physics and Astronomy have discovered very-high-energy gamma rays in the Cigar Galaxy (M82), a bright galaxy filled with exploding stars 12 million light years from Earth. The gamma rays observed by the team have energies more than a trillion times higher than the energy of visible light […]
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Buried deep in the Antarctic ice, an observatory has spotted ghostly, nearly massless particles coming from inside our galaxy and points beyond the Milky Way. Finding these cosmic neutrinos not only confirms their existence but also sheds light on the origins of cosmic rays, the researchers said. The IceCube Neutrino Observatory is made up of 86 shafts dug 8,000 feet […]
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