The Plan B One-Step morning-after pill will now be available to women as young as 15 without a prescription. AP hide caption

itoggle caption AP

Parents can minimize the negative impact of their arguments on their children using a few simple techniques to calm down. iStockphoto.com hide caption

itoggle caption iStockphoto.com

A miniature ninja throwing star or a surgical device? The microgripper, shown here coming out of a catheter tube, is activated by body heat. The sharp appendages fold up when the device warms up. Evin Gultepe, Gracias Lab, Johns Hopkins University. hide caption

itoggle caption Evin Gultepe, Gracias Lab, Johns Hopkins University.

SWAT team members stand guard on the campus of Massachusetts General Hospital following the explosions at the finish line of the Boston Marathon. Michael Dwyer/AP hide caption

itoggle caption Michael Dwyer/AP

Layton, Utah police department employees Holly Plotnick and Shanae Perez pack discarded medications from a collection bin in the lobby in January 2010. Mike Stark/AP hide caption

itoggle caption Mike Stark/AP

Amelia Schabel, 23, works with art director Andrew LaBounty at the nonPareil Institute in Plano, Texas. Courtesy of nonPareil hide caption

itoggle caption Courtesy of nonPareil