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A new study supports previous reports that adolescents with bipolar disorder are at increased risk for smoking and substance abuse. The article also indicates that bipolar-associated risk is independent of the risk conferred by other disorders affecting study participants.

Adults who survived childhood Hodgkin's Lymphoma should be especially vigilant about cancer and cardiovascular screenings, according to new research.

Licensed pesticide applicators who used chlorinated pesticides on more than 100 days in their lifetime were at greater risk of diabetes. The associations between specific pesticides and incident diabetes ranged from a 20 percent to a 200 percent increase in risk, said the scientists with the NIH's National Institute of Environmental Health Sciences and the National Cancer Institute.

Healthy adults who were close to the World Trade Center during the terrorist attacks on Sept. 11, 2001, have less gray matter in key emotion centers of their brains compared with people who were more than 200 miles away, finds a new Cornell study. "This suggests that really bad experiences may have lasting effects on the brain, even in healthy people," said the study's lead researcher.

Children removed from their homes after reports of maltreatment have significantly fewer behavior problems three years after placement with relatives than if they are put into foster care, according to new research.

New techniques have been developed for identifying fingerprints on metal. The technique can enhance -- after firing -- a fingerprint that has been deposited on a small caliber metal cartridge case before it is fired.

Adult circumcision is safe in HIV-infected men without advanced HIV disease, according to research in PLoS Medicine. Analyzing results of two clinical trials of circumcision in the rural Rakai district of Uganda, scientists found approximately a 3 percent rate of moderate or severe surgical complications -- primarily infections -- in both HIV-positive and HIV-negative men, when circumcision was performed under optimal conditions.

Mammalian cells can produce tiny magnetic nuggets after the introduction of a single gene from bacteria, scientists have found. The gene MagA could become a valuable tool for tracking cells' movement through the body via magnetic resonance imaging.

What are the genes implicated in upright walking of humans? The discovery of four families in which some members only walk on all fours may help us understand how humans, unlike other primates, are able to walk for long periods on only two legs.

Is microwave radiation the nondestructive imaging technology of the future? Microwaves with frequencies from a few hundred gigahertz up to slightly over 1 terahertz, penetrate just a short distance into surfaces without the ionizing damage caused by X-rays. The technology could be used to detect skin cancer or image dental flaws beneath the enamel.