How do migratory birds know when it's time to fly back north?
A U of C professor who studies biological clocks explains why the warming weather is not the only factor that brings back ...
Shingles is awful, but there may be another reason to get vaccinated. It may fight dementia
A vaccine to fight dementia? It turns out there may already be one – shots that prevent painful shingles also appear to protect aging brains. (AP video shot by Javier Arciga) ...