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Nearby asteroids are a diverse bunch in terms of reflectivity and composition

BY:kathy 20 hours ago on Technology      

A space-based survey of 101 objects that pass relatively close to Earth has found they have a wide range of reflectivity, indicating that their composition is varied as well. [More] Asteroid - Solar System - Earth - Astronomy - Small Bodies  Read More

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Lased and Confused: Off-the-Shelf Infrared Lasers Could Ward Off Missile Attacks on Military Helicopters

BY:jamms 20 hours ago on Technology      

Helicopter-mounted lasers that can dazzle and defend against heat-seeking missiles are now under development, researchers reveal. [More] Laser - Missile - Infrared homing - Helicopter - Business  Read More

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Re-thinking the Internet with security and mobility in mind

BY:jimbo 2 days ago on Technology      

The middle-aged Internet ( ARPANET first went live more than 40 years ago ) could easily slide into complacency, but the National Science Foundation (NSF) might be staving this off with four multimillion-dollar grants that the agency has recently awarded. The Future Internet Architecture (FIA) research projects are expected to re-think the network from the ground up, taking into account emergi  Read More

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The Deepening Crisis: When Will We Face the Planet's Environmental Problems?

BY:sammy 2 days ago on Technology      

With this final column I will transition Sustainable Developments from Scientific American to the home page of the Earth Institute ( www.earth.columbia.edu ). Although I will continue to contribute occasional essays to the magazine, I will use this last regular column to say thank you and take stock of the deepening crisis of sustainable development.During the four years of this column, the wor  Read More

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Which Ray?: Conflicting Data on High-Energy Cosmic Rays Leave Their Source--or Sources--Unresolved

BY:sammy 4 days ago on Technology      

Nature certainly has a way of one-upping the fruits of human ingenuity. Extreme astrophysical objects have long been known to accelerate the particles that make up cosmic rays to whopping energies that make the Large Hadron Collider look like a child's slingshot. The mammoth collider near Geneva, Switzerland, which resumed service in 2009 after an aborted start-up the year before, will ultimate  Read More

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Attractive Therapy: Magnetic Brain Stimulation Gaining Favor as Treatment for Depression

BY:sammy 4 days ago on Technology      

Treatment of severe depression with magnetic stimulation is moving beyond large mental health centers and into private practices nationwide, following more than two decades of research on the treatment. Yet even as concern about its efficacy fades, one potential side effect--seizures--continues to shadow the technology. [More] Mental health - Health - Major depressive disorder - D  Read More

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Improved Rail-Road Cars

BY:jimbo 6 days ago on Technology      

Editor's note: We celebrate Scientific American's 165th anniversary on August 28 with this reproduction of what amounts to the cover story . Interestingly, the story states that passengers would comfortably be "flying" at 30 to 40 miles per hour; contrast that with the last line of the "Morse's Telegraph" story in the same issue, which described railroad cars as "slow  Read More

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Morse's Telegraph

BY:eminaaron 6 days ago on Technology      

Editor's note: .-- .... [More] Recreation - History - Engineering and Technology - Telegraphy - Telephones and Telegraphs  Read More

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What Comes Next: Experts Predict the Future (preview)

BY:amy 8 days ago on Technology      

The Age of Digital Entanglement By Danny Hillis [More] Future - Business - Eric Mangini - MySpace - Quantum entanglement  Read More

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Sign of the Times: Deaf Find Their Voices via Mobile Video and Apps

BY:jimboze 8 days ago on Technology      

Wireless gadgets have changed the way nearly everyone communicates, but one group has benefited more than others: the deaf. For those who cannot make a voice call, texting and video, in particular, have not only opened them up to the hearing world and to each other, but also allowed them to use American Sign Language (ASL) , often their native language. [More] American Sign Languag  Read More

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Meteorite nugget pushes back age of the solar system by nearly 2 million years

BY:jamms 10 days ago on Technology      

A new analysis of a meteorite shows that an inclusion within the carbonaceous stone is older than any known material in the solar system. The finding pushes back the estimated age of the solar system to 4.568 billion years, older than previous estimates by up to 1.9 million years. [More] Solar System - Meteorite - Renewable - Energy - Solar  Read More

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Laying Odds on the Apocalypse: Experts Assess Doomsday (preview)

BY:jamms 10 days ago on Technology      

With all due respect to T. S. Eliot, maybe the world really does end with a bang, not a whimper. Whether of our own creation (nuclear holocaust) or of nature’s (asteroid impact), plenty of cataclysms could doom civilization--perhaps even putting the survival of the species in jeopardy. We assessed the likelihood of several doomsday scenarios, from oft-discussed threats such as climate chang  Read More

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Self-cleaning solar panels could find use in the dusty environs of Arizona, the Middle East or Mars

BY:jimbo 12 days ago on Technology      

The best places to collect solar energy are also some of the dustiest on Earth and beyond, a quandary that leads to inefficiencies in how well the cells are able to convert strong sunlight into renewable electricity. The solution, according to new research, is to coat solar cells with material that enables them to chase away dirt particles on their own with the help of dust-repelling electrical  Read More

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New stem cell processing promises faster, more reliable research

BY:eminaaron 12 days ago on Technology      

Stem cells have been touted as potential antidotes to nearly everything ranging from blindness to paralysis, as well as valuable models on which to study disease. But in order for researchers to discover and refine new cell-based treatments, they need plenty of cellular subjects. [More] Stem cell - Research - Biotechnology - Cell - Biology  Read More

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Four winners of the 2010 Fields Medal announced

BY:kathy 14 days ago on Technology      

There is no such thing as the Nobel Prize in Mathematics, but fortunately the field of math dishes out its own top honors every four years, bestowing the prestigious Fields Medal on two to four researchers. (Unfortunately for mathematicians, the cash prize attached to the Nobels is a far sight bigger.) [More] Fields Medal - Mathematics - Math - Nobel Prize - Mathematicians  Read More

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