NODE SMITH, ND A stimulating environment keeps the "hippocampus" -- which is the brain's memory control center -- young, so to speak. Causes of this are molecular mechanisms that affect gene regulation. These current findings from studies in mice provide clues as to...

NODE SMITH, ND Cells contain machinery that duplicates DNA into a new set that goes into a newly formed cell. That same class of machines, called polymerases, also build RNA messages, which are like notes copied from the central DNA repository of recipes, so they can...