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  May 7, 2004

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SETI and the Smallest Stars - Space.com   For the astrobiologists at SETI and many other institutions, M dwarfs are taking center stage in a debate on whether or not they can be habstars, that is, stars that can support a web of advanced lifeforms the way our Sun does. M dwarfs are as numerous as the sand on the seashore, making up perhaps ninety percent of all the stars. And these 300 billion or so stars live an exceedingly long time. The very first M stars ever made are still shining.
A Conveyor Belt For The Nano-Age - SpaceDaily  Left:  A glimpse into the factory of the future. Four images, each taken 60 seconds apart, portray the rightward march of indium atoms along a carbon nantoube subjected to about two volts (courtesy of Zettl Research Group).  In a development that brings the promise of mass production to nanoscale devices, Lawrence Berkeley National Laboratory scientists have transformed carbon nanotubes into conveyor belts capable of ferrying atom-sized particles to microscopic worksites. "We're not transporting atoms one at a time anymore it's more like a hose," says Chris Regan of Berkeley Lab's Materials Sciences Division, who co-authored the article along with fellow Materials Sciences researchers Shaul Aloni, Ulrich Dahmen, Robert Ritchie, and Alex Zettl. Aloni, Regan, and Zettl are also scientists in the University of California at Berkeley's Department of Physics, where much of the work was conducted. The ability to shuttle a stream of particles to precise locations fills a void that has stymied the efficient assembly of nanostructures. For years, scientists have been able to simultaneously deliver millions of atoms to millions of sites simply by mixing chemicals. "It's either all at once, or excruciatingly serial," says Regan. "So we combined incredibly precise localization with something that has higher throughput." This middle ground is made possible by carbon nanotubes, which are hollow cylinders of pure carbon about ten thousand times smaller than the diameter of a human hair. Since their discovery in the sooty residue of vaporized carbon rods, these incredibly strong and versatile macromolecules have been engineered into frictionless bearings, telescoping rods, and the world's smallest room-temperature diodes. Now, they're poised to change the way these and other devices are constructed. 


What If ...   Asteroids blasting the planet may seem unlikely, but how extreme would the devastation be if it really did happen? Now you can find out in excruciating detail, thanks to a new Web-based project (http://www.lpl.arizona.edu/impacteffects) that allows anyone to calculate the grim reality of a cosmic collision like the ones that wiped out the dinosaurs.  Let's say, for example, an asteroid chunk about a half-mile in diameter and made up of porous rock crashes into Earth. The Web project's originators estimate it would create a crater 6.7 miles wide and trigger a fireball that would spread for 4.7 miles, spontaneously igniting grass, trees and clothes, and severely burning anyone in its path.

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Alzheimer's Disease:
5/7/2004:Preliminary Results Are Promising In Alzheimer's Gene Therapy Trial - Science Daily
5/7/2004:OHSU Researchers Uncover Genes Involved In Early Stages Of Alzheimer's Disease
5/7/2004:Some Cases Of Parkinson's, Alzheimer's Linked To Common Gene
 - Science Daily

5/7/2004:Nanobiosensor Technology Gives New Access To Living Cell's Molecular Processes - Science Daily
5/7/2004:Technique Plucks Rapidly Evolving Genes From A Pathogen's Genome
 - Science Daily
5/7/2004:Suffocating cells show sex difference  - Nature
5/7/2004:Double vision  - Nature

Climate, Environment:
5/7/2004:New NASA Technology Helps Forecasters In Severe Weather Season - Science Daily
5/7/2004:Return of the snakehead  - Nature
5/7/2004:Brownfields get muck makeover  - Nature

5/7/2004:'Delgo' takes animation beyond Hollywood  - CNN

5/7/2004:Companies Smooth Net Phone Call Hang-Ups - ABC
5/7/2004:Companies team to provide voice over cable - Business Week
5/7/2004:New Sprint billing plan buys more time  - CNN

5/7/2004:High-speed Nanotube Transistors Could Lead To Better Cell Phones, Faster Computers - Science Daily

5/7/2004:Honey, I Shrunk the Keyboard - Business Week
5/7/2004:PCs to gain multimedia savvy for home market - Business Week

5/7/2004:Trading in a Cloud of Electrons - Business Week
5/7/2004:E-Biz Strikes Again! - Business Week
5/7/2004:No Net Taxes: Why Not? - Business Week
5/7/2004:The How and Why of Google's Auction - Business Week
5/7/2004:Google sizes up the competition - Business Week
5/7/2004:Technology smooths Google's IPO path - Business Week
5/7/2004:Fast worm hits PCs  - CNN
5/7/2004:Google and the markets  - CNN
5/7/2004:Beyond the IPO, Google may have big plans - New Scientist


5/7/2004:Nuclear disarray as Europe pushes east - New Scientist


5/7/2004:Another Weapon For Beating Cancer: Exercise - Science Daily
5/7/2004:Presence Of Gene Mutation Tightly Linked To Drug Effectiveness In Lung Cancer - Science Daily

5/7/2004:Equine Influenza Virus Likely Involved In Recent Respiratory Disease Outbreak In Racing Greyhounds - Science Daily
5/7/2004:Cranberry Juice May Reduce Risk Of Female Urinary Tract Infections - Science Daily
5/7/2004:New Ear Infection Guidelines Released - ABC
5/7/2004:Animal-To-Human Disease Transfer Discussed - ABC
5/7/2004:Desert gerbils signal plague  - Nature
5/7/2004:Uganda's HIV epidemic wanes  - Nature
5/7/2004:Superbug dodges lab tests
  - Nature


5/7/2004:Dental X-rays Of Pregnant Women Associated With Low-weight Babies - Science Daily
5/7/2004:Winning The Battle Of The Bulge: We're A Scrimmage Closer To Victory - Science Daily
5/7/2004:Northwestern Memorial Tests 'Pacemaker' For Stomach - Science Daily
5/7/2004:Biological Cause Of One Form Of Blindness Identified By SLU Researchers - Science Daily
5/7/2004:Study: Height Loss Screen Ultimately Could Reduce Hip Fractures - Science Daily
5/7/2004:Obese Kids More Likely to Be Bullied - ABC
5/7/2004:Uninsured Get Help Suing Hospitals - ABC
5/7/2004:Study: Ohio Teen Health Habits Improve - ABC
5/7/2004:Spinach pigments proposed as blindness cure - New Scientist

History, Anthropology:
5/7/2004:Scientists trace roots of fire's use - MSNBC
5/7/2004:DNA shoots hole in Captain Cook legend - MSNBC
5/7/2004:Earliest fire sheds light on hominids  - Nature

5/7/2004:What If ...
5/7/2004:Anthrax Survivors Continued To Have Health Problems One Year After Exposure - Science Daily
5/7/2004:Student-built Projectile Could Help Soldiers Detect Bombs, Chemicals - Science Daily
5/7/2004:Researchers Begin Study To Protect Against Anthrax - Science Daily
5/7/2004:The Future's Past - ABC
5/7/2004:Worrisome or Wonderful? - ABC
5/7/2004:China Tourists Stock Up on Infant Formula - ABC
5/7/2004:Bush's Double Vision on Privacy - Business Week
5/7/2004:Democracy and Control in Google's IPO - Business Week
5/7/2004:Digital video recorders taking off  - CNN
5/7/2004:Oregon prisoners get flat-screen TVs  - CNN
5/7/2004:Google and the markets  - CNN
5/7/2004:Pentagon tests toxin detection and forecast system  - El. Engr. Times
5/7/2004:E-voting firm blasted - MSNBC
5/7/2004:Business goes quantum  - Nature
5/7/2004:Combat raises risk of rare disorder  - Nature
5/7/2004:Superglue gun could finger bomb suspects - New Scientist

5/7/2004:Spare the Rod - ABC
5/7/2004:Bigger Than Depression? - Business Week
5/7/2004:Brain-watching helps suppress pain - New Scientist

Physics and Astronomy:
5/7/2004:Published Paper Probes Pulsar Pair - Science Daily
5/7/2004:All Systems Go On Gravity Probe B
 - Science Daily
SETI and the Smallest Stars - Space.com
5/7/2004:Scientists Announce Cosmic Ray Theory Breakthrough
 - SpaceDaily


5/7/2004:Robotic traffic cones hit the road - MSNBC

5/7/2004:Panel: NASA Needs New Heavy-Lift Launch Vehicles - Space.com
5/7/2004:Molecular rings could shelter Venus bugs
 - New Scientist
5/7/2004:Mars Rovers in Autumn: A Life-and-Death Drama on the Red Planet
 - Space.com
5/7/2004:Cassini Sees Xanadu on Saturn's Moon Titan
 - Space.com
5/7/2004:Mars and the Teachable Moment
 - Space.com
5/7/2004:An Enduring Opportunity
 - SpaceDaily
5/7/2004:First post-Columbia astronauts named...

5/7/2004:Nanogold Does Not Glitter, But Its Future Looks Bright - Science Daily
5/7/2004:Berkeley Lab Physicists Develop Way To Digitally Restore And Preserve Audio Recordings - Science Daily
5/7/2004:Space Technology Competes On Europe's Racetracks Again - Science Daily
5/7/2004:A Conveyor Belt For The Nano-Age - SpaceDaily
5/7/2004:Vision system scans cars from road perspective  - El. Engr. Times
5/7/2004:Could nanomachines be tomorrow's doctors?  - Nature


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