Google has backed a venture to use satellites to bring high-speed Internet to three billion people in Africa and other developing markets around the equator. Today Google announced a partnership with cable operator Liberty Global and bank HSBC. Their partnership is called O3b Networks—O3b stands for “other 3 billion,” a reference to the world’s population that still can’t access the Internet [The New York Times].
The group announced an order for 16 satellites as the first stage in the $750 million project, which will provide cheap, fast Internet access to companies that sell internet service via mobile phones or wireless networks. The move is being greeted as a clever technological solution, a boon for the developing world, and a smart business move. “Google has an interest in boosting the Internet all over the world to reach new masses,” said [business analyst] Wim Zwanenburg…. “The growth market for Internet and mobile phones is in emerging countries” [Bloomberg].
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A new analysis of the skulls of three Neanderthal babies shows that the cranium of a newborn Neanderthal was about the same size as that of a newborn Homo sapiens, and that the Neanderthal children grew faster than modern humans in the first few years of life. The report on the young skeletons, which date from between 45,000 to 50,000 years ago, adds fuel to the debate over how similar Neanderthal culture was to that of our early Homo sapiens ancestors.
A big-headed infant skeleton found in Russia suggests that childbirth was no easy task for for Neanderthal women. Neanderthal mothers had slightly larger birth canals, but the prominent face of Neanderthal babies made it just as hard to push out as a modern human. This suggests that both groups had the social structures needed to help with childbirth [New Scientist].
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A new batch of genetically engineered bacteria may be able to slash the cost of producing ethanol from tough materials like wood chips and switchgrass, pushing the young ethanol industry closer to its goal of creating commercially competitive alternative fuel from the waste products of farming and forestry. Ethanol from cellulose, the kind of sugar in the likes of cornstalks and sawdust, is being promoted as an environmentally friendly alternative to fossil fuels, with the advantage that it does not use food crops such as corn as raw materials [Reuters].
Ethanol from corn and sugarcane is relatively easy to produce, because yeast convert the readily accessible sugars and starches into ethanol. Cellulose presents a stiffer challenge. Cellulose fibers contain longer polysaccharide chains than those found in starches and surround them with lignin and hemicelluose, which hold the fibers together and provide strength. This makes them tough—tough enough to hold up a tree—but it also makes the sugars within very hard to access [Ars Technica].
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When the space shuttle Atlantis docks with the Hubble Space Telescope for a final repair mission in October, astronauts will face a unusually high risk of a catastrophic collision with orbital debris, NASA officials say. The amount of space junk in the environment around the Hubble adds another element of danger to the already challenging mission, which aims to keep NASA’s premier telescope in service until at least 2013.
The environment where Hubble flies, about 350 miles (560 km) above the planet, is more littered with shards of exploded spacecraft and rockets than the area around the International Space Station, which orbits about 210 miles above Earth. The odds of catastrophic damage from an orbital debris strike are 1 in 185 for the Hubble crew, compared with 1 in 300 for missions to the space station, John Shannon, the shuttle program manager, told reporters. “It’s our biggest risk,” he said [Reuters].
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Tiny invertebrates known as water bears are in one sense far tougher than humans who can crush hundreds of them underfoot: A new study has shown that the water bears can survive the vacuum and radiation of space. The water bears, who are more properly known as tardigrades, were launched into orbit aboard a European Space Agency satellite, where they were exposed for 10 days to the cold, low pressure, and intense radiation of space before being brought back down to Earth to study.
Researchers already knew that water bears were unusually tough critters. [T]hey prefer to spend their days in water, perhaps on a beach or a dewy patch of moss. But when the water dries up, the millimetre-long ‘bears’ can contract into a dried-out state and survive like that for years. They are also one of the few animals that survive year-round on continental Antarctica, and are among the most radiation-resistant animals known [Nature News].
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An international group has given India special approval to buy nuclear technology to further its nuclear power program, although the country has steadfastly refused to sign the nuclear non-proliferation treaty. The decision, made by the 45-nation Nuclear Suppliers Group (NSG), was strongly supported by the United States, which hopes to sell the technology to India. The NSG adopted a one-off waiver of a 34-year-old global ban on nuclear trade with India, allowing New Delhi and Washington to do business [Reuters].
The proposed deal between the United States and India still has to be approved by the U.S. Congress, and there are several roadblocks to its immediate passage. Congress will be in session for only two weeks this September before breaking again for the final flurry of campaigning before the November election, and supporters of the India deal will have to pass special legislation to expedite the approval process. ‘‘I’d say the chances of it getting past the senate are 50-50,” a Senate aide said. ”Senators are good at tying things up in knots” [Times of India].
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A new study argues that people have an intuitive understanding of numbers that closely correlates with their aptitude for complex math, and that some people are simply better at it. The research team found that 14-year-olds who were better at estimating quantities were more likely to have gotten high grades in math. Says lead researcher Justin Halberda: “We discovered that a child’s ability to quickly estimate how many things are in a group significantly predicts their performance in school mathematics all the way back to kindergarten” [Washington Post].
Researchers expressed surprise that the basic “number sense” that has been observed in some animals is linked to the ability to solve complicated equations. “Maximising your search for food, finding a seat on the bus, recognizing the difference between a mating call and an alarm call in a particular species of bird by the number of warbles — all of these require [number sense]…. What is surprising is that the formal mathematics we work so hard to learn in school … is related in any way to what a rat is doing when it is out looking for scraps of food, or what you and I are doing when we look for a seat on a bus,” said Halberda [AFP].
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Developments in “electronic ink” technology are letting publishers experiment with new ways of bringing printed material to the public, and several futuristic products are close to hitting the marketplace. A new device being previewed by the company Plastic Logic is pointing the way to the sci-fi dream of carrying one flexible screen that could display written material from any source at the touch of a button, from newspapers to complete novels. Meanwhile, the men’s magazine Esquire will sport an electronic image on the cover of its October issue: A 10-square-inch display on the cover … flashes the theme “The 21st Century Begins Now” with a collage of illuminated images [AP].
Both Plastic Logic and Esquire are using technology created by the company E Ink, which has also provided screens for Sony’s eReader and Amazon.com’s Kindle, two devices primarily intended for book-reading. The screens use electronic ink, which is made up of microcapsules embedded with white and black pigment. The capsules respond to electric charges, creating images that are easily viewed during the day, from any angle and require very little power [San Francisco Chronicle].
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In between Mars and Jupiter, the spacecraft Rosetta buzzed by an asteroid on Friday and snapped photos of the chunk of rock as it hurtled through space. The European Space Agency‘s spacecraft flew to within 500 miles of the Steins asteroid, getting a close-up view of the diamond-shaped Steins asteroid, a gray, 3-mile (5-km) wide rock that appears in images as a pock-marked [rock] with multiple craters that ultimately will help determine its age [SPACE.com].
Researchers hope that the Rosetta’s observations of the asteroid will shed light on the processes that shaped our solar system. The rocks are often referred to as “space rubble” because they represent the leftovers that were never incorporated into planets when the Solar System formed 4.6 billion years ago. As with comets, they may contain very primitive materials that have not undergone the constant recycling experienced by, for example, Earth rocks. Rosetta data should therefore help researchers understand better how our local space environment has evolved over time [BBC News].
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Next week, German officials will flip the switch and turn on the world’s first coal-fired power plant to use carbon capture and storage technology, in which carbon dioxide is stripped out the plant’s emissions and pumped deep underground. This “clean coal” technology has been hailed as a possible way to get cheap energy without further contributing to global warming. The 30 megawatt Schwarze Pumpe power station, built and operated by Swedish power company Vattenfall, will produce power along with 10 tons of highly concentrated CO2 an hour. The CO2 will be loaded onto tankers and taken to a nearby gas field for sequestration [Earth2Tech].
The new Vattenfall plant is a relatively small pilot project intended to test the viability of carbon capture and storage; these technologies have yet to be deployed in full-scale commercial plants, which typically generate hundreds of megawatts of power. The technologies are currently expensive, partly because capturing and compressing carbon dioxide into liquid requires a good amount of energy. Critics also have questioned their effectiveness in keeping emissions sealed underground [GreenTech Media]. For all these reasons, some experts have wondered whether clean coal plants are a realistic option for large-scale energy production.
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Researchers have gotten an amazingly close look at the human brain’s methods of short-term memory formation and recollection. A new study has examined the activity of individual brain cells, and found that the same neurons that fire when a person gets their first look at something fire again when they recall it.
Scientists at the University of California, Los Angeles, (U.C.L.A.) showed 13 volunteers—epilepsy patients with therapeutic electrodes implanted in their brains—several five- to 10-second clips from videos such as The Simpsons. The researchers found that a small sample comprising some 50 neurons in the hippocampus and entorhinal cortex (memory centers in the brain) fired in distinctive repeatable patterns that differed for each clip [Scientific American]. A few minutes later, when researchers asked the volunteers to think back to the film clips and say what came to mind, the neurons fired in the same distinct patterns when they mentioned each clip.
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The last woolly mammoths, who tromped around the Siberian tundra before going extinct about 10,000 years ago, had North American roots, according to a new genetic analysis. Scientists studied DNA from the remains of 160 mammoths from across North America and Eurasia, and determined that the last remaining mammoths were migrants who had come to Siberia via the Bering land bridge, and somehow replaced the endemic population.
Researchers believe that mammoths originally spread from Asia to North America via the land bridge, creating two genetically distinct populations. Now, they’re hypothesizing that some members of the North American group eventually made a return trip and proved hardier survivors than the Siberian group. “For some reason the North American guys went back over and became kings,” says [lead researcher] Hendrik Poinar [New Scientist].
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Climate scientists have long predicted that global warming will melt polar ice sheets and cause sea levels to rise throughout the century, potentially swamping island nations and flooding low-lying coastal cities. But exactly how much ocean waters will rise has yet to be settled. Now, two studies have come out that at first appear to contradict each other, leading to clashing headlines like “An Inconvenient Truth” Exaggerated Sea Level Rise [Telegraph], and Sea Level Rise May Be Twice More Than Expected [Discovery News].
One study seems to downplay the risk of an extreme sea-level rise, while the other hypes it up. But a closer look reveals that the two studies actually bring researchers nearer to scientific consensus.
In the study published in Science [subscription required], researchers examined the hypothesis of a six-foot sea-level rise by 2100, and calculated how quickly the ice sheets in Greenland and Antarctica would have to melt into the oceans to produce this effect. Their calculations showed that the glaciers would have to essentially gallop towards the sea, which seems an unlikely outcome. In Greenland, the glaciers moving into the island’s calving fjords would have to increase their speed to 28.4 miles per year and sustain that speed until the end of the century [Telegraph]. These researchers believe the most plausible scenario is a sea-level rise of between two and six feet within this century. As their results have been compared to more radical estimates like the 20-foot rise mentioned in the documentary film An Inconvenient Truth, the findings are being greeted with relief.
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Researchers have discovered a stretch of “junk” DNA that may have contributed to humanity’s evolution of opposable thumbs. When genetically engineered into mice, the human DNA seems to activate genes in the budding wrist and thumb. Chimp and monkey versions, on the other hand, seem only capable of switching on genes in the developing shoulder [New Scientist].
In a new study, the research team combed through the vast regions of human DNA that do not contain code for making proteins. Formerly dissed as “junk DNA,” sections of these non-gene regions are now known to play a regulatory role, dialing down or cranking up the activity of actual genes [Science News]. Researchers first found a long sequence of DNA that had barely changed during the entire evolution of backboned creatures, and then zeroed in on a smaller stretch of code that had accumulated 16 changes since the ancestors of humans and chimpanzees split, about 6 million years ago.
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Bumblebees that have a close encounter with a dangerous predator are still cautious and wary the next day, even though their trepidation slows them down as they forage for food. In a new study, researchers used robot spiders to briefly trap the bees and study their behavior afterwards, and found that in the end, some of the bumblebees get a little paranoid…. “They’re behaving as if they’re starting to see ghosts,” [co-author Lars] Chittka says [Science News].
The researchers used small robots to imitate the look and behavior of crab spiders, which are one of the major predators of bumblebees. They lie in wait in flowers which the bees need to visit to collect nectar, and are difficult to spot because they can change colour to match their surroundings [New Scientist].
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