Antarctic Icebergs Help Ocean Take Up Carbon Dioxide The first comprehensive study of the biological effects of Antarctic icebergs shows that they fertilize the Southern Ocean, enhancing the growth of algae that take up carbon dioxide from the atmosphere and then, through marine food chains, transfer carbon into the deep sea. This process is detailed [...]
Gravity Probe B Confirms Two Einstein Space-Time Theories NASA’s Gravity Probe B (GP-B) mission has confirmed two key predictions derived from Albert Einstein’s general theory of relativity, which the spacecraft was designed to test. The experiment, launched in 2004, used four ultra-precise gyroscopes to measure the hypothesized geodetic effect, the warping of space and time [...]
Universal Signaling Pathway Found to Regulate Sleep Sleeping worms have much to teach people, a notion famously applied by the children’s show “Sesame Street,” in which Oscar the Grouch often reads bedtime stories to his pet worm Slimy. Based on research with their own worms, a team of neurobiologists at Brown University and several other [...]
New Tools to Tackle a Solar Data Storm So great is the wealth of data about the Sun now being sent back by space missions such as SOHO, STEREO and the Solar Dynamics Observatory (SDO) that scientists back on Earth can struggle to keep pace. To combat this data overload, scientists from the Visual Computer [...]
Measuring the Distant Universe in 3-D Using Light from 14,000 Quasars The biggest 3-D map of the distant universe ever made, using light from 14,000 quasars — supermassive black holes at the centers of galaxies billions of light years away — has been constructed by scientists with the third Sloan Digital Sky Survey (SDSS-III). The [...]
New Evidence on Origin of Supernovas Astronomers may now know the cause of an historic supernova explosion that is an important type of object for investigating dark energy in the universe. The discovery, made using NASA’s Chandra X-ray Observatory, also provides strong evidence that a star can survive the explosive impact generated when a companion [...]
Full 3-D Invisibility Cloak in Visible Light Watching things disappear “is an amazing experience,” admits Joachim Fischer of the Karlsruhe Institute of Technology in Germany. But making items vanish is not the reason he creates invisibility cloaks. Rather, the magic-like tricks are attractive demonstrations of the fantastic capabilities that new optical theories and nanotechnology construction [...]
Geologists Solve Mystery of the Colorado Plateau A team of scientists led by Rice University has figured out why the Colorado Plateau — a 130,000-square-mile region that straddles Colorado, Utah, Arizona and New Mexico — is rising even while parts of its lower crust appear to be falling. The massive, tectonically stable region of the [...]
Melting Ice on Arctic Islands a Major Player in Sea Level Rise Melting glaciers and ice caps on Canadian Arctic islands play a much greater role in sea level rise than scientists previously thought, according to a new study led by a University of Michigan researcher. The 550,000-square-mile Canadian Arctic Archipelago contains some 30,000 islands. [...]
Beams of Electrons Link Saturn With Its Moon Enceladus Data from NASA’s Cassini spacecraft have revealed that Enceladus, one of Saturn’s diminutive moons, is linked to Saturn by powerful electrical currents — beams of electrons that flow back and forth between the planet and moon. The finding is part of a paper published in Nature. [...]
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