Entering a cell and watching its entire inner machinery at work, how DNA is copied, how proteins are assembled, or how it splits in two, has been, for decades, an impossible dream. Now, scientists at ...

Stem cells are gaining attention for their potential to treat leukemia, certain solid tumor cancers, and inherited metabolic disorders. Now, a clinical trial reports that a single dose can ...

Much more difficult is learning to connect different types of stimuli or events, and predicting that one is linked to another. Such associative learning was most famously demonstrated when Ivan Pavlov ...