A new study has found evidence that some teenagers are at higher risk for substance abuse because their brains work differently, in ways that make them more impulsive. The same study has also found that different networks in the brain seem to be connected to symptoms of ADHD.

During the Jim Crow era, some African-Americans or biracial Americans who were physically able chose to pass as white. A new study co-authored by a UVM professor finds that passing still occurs today, but that instead of passing as white, some biracial Americans are now passing as black.