Patricia Bayonne-Johnson holds a photo of her great-grandparents and their son. The retired science teacher discovered that some of her ancestors were sold by the Jesuits of the Maryland Province in 1838, to pay off Georgetown University's massive debt. Nick Otto/The Washington Post/Getty Images hide caption

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Dr. Richard Schlegel and postdoctoral fellow Nancy Palechor-Ceron use a microscope to look at human epithelial cells growing on mouse fibroblasts at Georgetown University Medical Center. Lauren Wolkoff/Georgetown University hide caption

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A Bed Of Mouse Cells Helps Human Cells Thrive In The Lab

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Thousands gathered on the National Mall last week to protest the deaths of Eric Garner and Michael Brown. Some law students say their involvement in the protests means their exams should be postponed. Saul Loeb/AFP/Getty Images hide caption

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Troubled By Grand Jury Verdicts, Students Request More Time For Exams

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