Women are twice as likely as men to develop post-traumatic stress disorder (PTSD) -- and new research may offer a biological clue as to why. A Virginia Tech study found that the female brain forms fear memories using a molecular process not seen in the male brain. The findings suggest that treatments for PTSD may need to be tailored differently for men and women, said the study's lead researcher, Timothy Jarome, an associate professor of neurobiology in the School of Animal Sciences located with