In sighted people, the part of the brain that recognizes faces is linked to the brain's visual system. But in blind people it seems wired to circuits that process sound.
Tina Zellmer/Ikon Images/Corbis
A tangle of protein (green) in this scanning electron micrograph of a brain cell of an Alzheimer's patient lies within the cytoplasm (blue) of the cell. The tangle consists of clumps of a toxic form of tau.
Thomas J. Deerinck/Corbis
A screen presents the winners of the Nobel Prize in Medicine, U.S.-British scientist John O'Keefe and Norwegian husband and wife Edvard Moser and May-Britt Moser, for their discoveries of cells that constitute a positioning system in the brain.
TT News Agency/Reuters/Landov