Studying the process of brain formation illuminates just how much of development is a series of tiny miracles. Only a few ...

Not all tumor cells the same Tumors aren't made up of just one cell type - they're a mix of different cells that grow and respond to treatment in different ways.

One reason it's taken so long, Studer says, is that stem cells have the potential to become so many different kinds of cells. It takes just the right mix of chemicals at just the right time to ...