Human immunodeficiency virus (HIV) is a viral infection that attacks certain cells in your immune system that help you fight off infections. HIV is transmitted through bodily fluids like semen, ...

Neuroscientists have discovered brain cells that form multiple coordinate systems to tell us "where we are" in a sequence of behaviors. These cells can play out different sequences of actions, just ...

No less than 16 different types of nerve cells have been identified by scientists in a new study on the human sense of touch.