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Is a military presence needed to regain control of America’s schools? 4x6 via Getty Images

Is the National Guard a solution to school violence?

School board members in one Massachusetts district have called for the National Guard to address student misbehavior. Does their request have merit? A school discipline expert weighs in.
Within weeks, for the first time in the U.S. consumers will be able to find a birth control pill on retail shelves. Bill Oxford/iStock via Getty Images

Opill, the first over-the-counter birth control pill, will be on shelves soon − here are some key things to know

Once available, Opill will be the most effective form of nonprescription birth control on the market. But you should still speak with your health care provider about any questions.
Understanding the flexibility of T cell memory can lead to improved vaccines and immunotherapies. Juan Gaertner/Science Photo Library via Getty Images

Immune cells can adapt to invading pathogens, deciding whether to fight now or prepare for the next battle

When faced with a threat, T cells have the decision-making flexibility to both clear out the pathogen now and ready themselves for a future encounter.
The characteristic hammer-shaped head is just becoming visible in this image of an embryonic bonnethead shark. Scale bar = 1 cm. Steven Byrum and Gareth Fraser, Department of Biology, University of Florida

Rare access to hammerhead shark embryos reveals secrets of its unique head development

Because hammerhead sharks give birth to live young, studying their embryonic development is much more complicated than harvesting some eggs and watching them develop in real time.