The Nobel Committee announced the winners of the 2009 Nobel Prize in Physiology or Medicine, equally shared between Elizabeth Blackburn of UCSF, Carol Greider of Johns Hopkins, and Jack Szostak of Harvard Medical School, awarded for the discovery of telomeres.

Adults with untreated ADHD have lower dopamine transporter and receptor activity in key brain regions when compared to typical controls.

The current state of the H1N1 flu pandemic.

H5N1 infection could also take a more inconspicuous toll on the brain, causing the sorts of damage that could increase the risk of diseases like Parkinson's and Alzheimer's many years after the virus has been cleared.