Heart researchers at the Center for Translational Medicine at Jefferson Medical College have used gene therapy to reverse heart failure in animals. In addition, they found that this gene therapy strategy had "unique and additive effects" to currently used, standard heart failure drugs called beta-blockers.

Researchers have found that bricks made from fly ash--fine ash particles captured as waste by coal-fired power plants--may be even safer than predicted. Instead of leaching minute amounts of mercury as some researchers had predicted, the bricks apparently do the reverse, pulling minute amounts of the toxic metal out of ambient air.

Score one for body language: It seems that body shape and the way people walk hold major cues to their attractiveness to others, according to collaborative research findings published by Texas A&M University professor Louis G.

The legislative push for "abstinence only" sex education has suggested that nonmarital sex negatively affects a teen's mental health but a new study says that the negative mental side effects of a teen's loss of virginity are confined to a small proportion of those who have sex -- specifically, young girls, but including both boys and girls who have sex earlier than their peers and whose relationships are uncommitted and ultimately fall apart.

In the tropics, even the birds know how to relax better than those in the north. Tropical birds expend less energy at rest than do birds living in more northern climates, according to a study published online this week in the Proceedings of the National Academy of Sciences.

A new study in the May issue of the Journal of Wildlife Management reports that scientists from the New York State Museum, Wildlife Conservation Society and other groups have teamed up with the New York State Department of Criminal Justice to developed a new technique that uses fingerprints to track the fisher--an elusive member of the weasel family, and the only carnivore species known to have unique fingerprints.