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

Driven by precise new satellite measurements and sophisticated new computer models, a team of NASA researchers is now routinely producing the first global maps of fine aerosols that distinguish plumes of human-produced particulate pollution from natural aerosols.

In the current issue of the journal Nature, atmospheric scientists Yoram Kaufman, at NASA’s Goddard Space Flight Center, Greenbelt, Md., Didier Tanré and Olivier Boucher from CNRS (Centre National de la Recherche Scientifique)

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

Study shows antioxidant takes no bite out of atherosclerosis in healthy people

LOS ANGELES, Sept. 17-Despite its early promise, taking vitamin E does not appear to slow the progression of atherosclerosis in healthy people, according to researchers from the USC Atherosclerosis Research Unit and colleagues.

Many believe that atherosclerosis, the thickening of artery walls that can lead to heart attack and stroke, results from oxidative damage to tissue in the artery wall cause

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

Contrary to popular belief, repetition does not always improve one’s memory for brand claims

Everybody remembers the pink bunny promoting batteries that keep going and going but is it Energizer or Duracell?

Contrary to popular belief in marketing, repetition in advertising does not always improve consumers’ memory for brand claims, says a U of T study. “Consumers often do not absorb the information from ads, so repeating the ads doesn’t necessarily lead to be