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Penn study may explain cliche of ’hot-headed’ men

There is a sound neurological basis for the cliché that men are more aggressive than women, according to new findings by scientists at the University of Pennsylvania School of Medicine.

Using magnetic resonance imaging (MRI) scans, the Penn scientists illustrated for the first time that the relative size of the sections of the brain known to constrain aggression and monitor behavior is larger in women than in men.

The research, by Ruben C. Gur, PhD, and Raquel E. Gur, MD, PhD, and

Researchers Create Rare, Large Symmetrical Crystals

Accident Leads to Important Discovery

Researchers at Rensselaer Polytechnic Institute in Troy, N.Y., have created large symmetrical crystals that rarely occur in nature. These crystals could be harder than conventional engineering materials. The accidental discovery was made during attempts to make superconducting nanostructures with a simple technique used to create carbon nanotubes.

Pulickel Ajayan and Ganapathiraman Ramanath, faculty members in materials science and eng

Nano-Welding Creates Tiny Junctions

Researchers have discovered how to weld together single-walled carbon nanotubes, pure carbon cylinders with remarkable electronic properties. The discovery could pave the way for controlled fabrication of molecular circuits and nanotube networks.

Pulickel Ajayan, professor of materials science at Rensselaer Polytechnic Institute in Troy, N.Y., and his colleagues in Germany, Mexico, the U.K., and Belgium used irradiation and heat to form the welded junctions.

This is the first time

Gene therapy promising for preventing restenosis

An experimental gene transfer technique shut down cell re-growth in the arteries’ interior lining and reduced the inflammatory response – two main causes of re-narrowing of newly opened blood vessels, researchers report in today’s rapid access issue of Circulation: Journal of the American Heart Association.

The process that opens blocked blood vessels – either inflating a tiny balloon to force open the narrowed vessel (angioplasty) or inserting a tiny mesh tube called a stent to se

Research reveals a more complete picture of breast tissue

A team of Dartmouth engineers and doctors are trying to find more comfortable and comprehensive ways to examine breast tissue to better detect and diagnose breast cancer. The Dartmouth group is simultaneously developing and testing four different breast imaging techniques.

The multidisciplinary Dartmouth team includes researchers from the Thayer School of Engineering and Dartmouth Medical School, and they are working under the auspices of the Norris Cotton Cancer Center and the department o

After massive experiment, results favor wildlife corridors

To combat urban sprawl and protect wildlife, many communities have set aside land for wildlife corridors linking natural areas to one another.

Public support for these greenways, however, has overshadowed a long-running debate among ecologists about whether they actually achieve their presumed benefits. The debate has been hobbled by a lack of definitive data, with many studies based solely on observations and others only on small-scale experiments, scientists say.

A University of

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