Molecules autonomously propelled by polymerizing DNA strands
Nanotechnology / Bio & Medicine
Sep 06, 2007 |
4.4 / 5 (41) |
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Scientists from the California Institute of Technology have fabricated a motor that runs autonomously, and is powered only by the free energy of DNA hybridization. The molecular motor was inspired by bacterial ...
Height or flight? Fossil answers some questions about evolution of flight in dinosaurs, raises others
Other Sciences / Archaeology & Fossils
Sep 06, 2007 |
4.4 / 5 (29) |
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Paleontologists have long theorized that miniaturization was one of the last stages in the long series of changes required in order for dinosaurs to make the evolutionary “leap” to take flight and so become ...
Bee researchers close in on Colony Collapse Disorder
Biology /
Sep 06, 2007 |
4.9 / 5 (26) |
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Across the nation, beekeepers have seen hive after hive succumb to Colony Collapse Disorder (CCD); a team of entomologists and infectious disease researchers now report a strong correlation between the occupancy ...
Change from Arid to Wet Climate in Africa Altered Early Human Evolution
Space & Earth / Earth Sciences
Sep 06, 2007 |
4.5 / 5 (20) |
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A drastic change in the climate of tropical Africa may have significantly driven early human evolution, an international team of scientists has found.
Scientists Engineer 'Pumped-Up' Materials
Sep 06, 2007 |
4.4 / 5 (17) |
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Robots with 'roid rage? Responsive prosthetics leading to the Six Million Dollar Man or the Bionic Woman? North Carolina State University scientists have devised new materials that aim to put some serious muscle behind robots ...
Higher social skills are distinctly human, toddler and ape study reveals
Sep 06, 2007 |
4 / 5 (17) |
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Apes bite and try to break a tube to retrieve the food inside while children follow the experimenter's example to get inside the tube to retrieve the prize, showing that even before preschool, toddlers are ...
Researchers find a crucial difficulty in semiconductor device scaling
Sep 06, 2007 |
4.3 / 5 (16) |
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In 1959, Nobel Prize winner Richard Feynman presented a talk entitled "There's Plenty of Room at the Bottom." Feynman concluded that there was no physical reason why humans couldn't manipulate atoms. However, ...
Hubble, Spitzer find 'Lego-block' galaxies in early universe
Sep 06, 2007 |
4.8 / 5 (13) |
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The conventional model for galaxy evolution predicts that small galaxies in the early Universe evolved into the massive galaxies of today by coalescing. Nine Lego-like “building block” galaxies initially detected ...
Improved e-jet printing provides higher resolution and more versatility
Sep 06, 2007 |
4.3 / 5 (12) |
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By combining electrically induced fluid flow with nanoscale nozzles, researchers at the University of Illinois have established new benchmarks for precision control and resolution in jet-printing processes.
Core tenets of the 'histone code' are universal
Biology /
Sep 06, 2007 |
4.5 / 5 (11) |
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In one of biology’s most impressive engineering feats, specialized proteins called histones package some six-and-a-half feet of human DNA into a nucleus that averages just five microns in diameter.
TEAM Project Achieves Microscopy Breakthrough
Sep 06, 2007 |
4.1 / 5 (11) |
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The highest-resolution images ever seen in (S)TEM electron microscopy have been recorded using a new instrument developed jointly by U.S. Department of Energy national laboratories, FEI Company and CEOS GmbH, in Heidelberg, ...
Scientists shed new light on how antibodies fight HIV
Medicine & Health / HIV & AIDS
Sep 06, 2007 |
4.4 / 5 (10) |
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By furthering scientists’ understanding of the molecular mechanisms that separate the minority of successful HIV antibodies from the majority of ineffective antibodies, the work may have implications for future attempts to ...
Cassini Prepares to Fly by Walnut-Shaped Moon
Sep 06, 2007 |
4.3 / 5 (10) |
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Cassini will make its only close flyby of Saturn's odd, two-toned, walnut-shaped moon Iapetus on Sept. 10, 2007, at about 1,640 kilometers (1,000 miles) from the surface.
Joint Dark Energy Mission a Top Priority for NASA, Says NRC
Space & Earth / Space Exploration
Sep 06, 2007 |
4.1 / 5 (10) |
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The National Research Council's Beyond Einstein Program Assessment Committee has recommended that the Joint Dark Energy Mission (JDEM), jointly supported by the National Aeronautics and Space Administration ...
Primates expect others to act rationally
Medicine & Health / Psychology & Psychiatry
Sep 06, 2007 |
4.9 / 5 (8) |
0
When trying to understand someone's intentions, non-human primates expect others to act rationally by performing the most appropriate action allowed by the environment, according to a new study by researchers at Harvard University.
