Your brain is an extremely complex organ. It needs hundreds of different kinds of cells to work properly - yet, every brain starts as just a small handful of nearly-identical stem cells. How do they figure out, and subsequently remember, what kinds of brain cells to make? Listen to this 5-minute explainer of Maintenance of neural stem cell positional identity by Mixed-lineage leukemia 1, published in the April 03 issue of Science,to find out! Read the paper at https://science.sciencemag.org/content/368/6486/48.

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