Medical workers will test the effectiveness of three new potential Ebola therapies at clinics run by the nongovernmental organization Medecins Sans Frontieres (Doctors Without Borders). Zoom Dosso/AFP/Getty Images hide caption

itoggle caption Zoom Dosso/AFP/Getty Images

The SmartMat is a responsive yoga mat that seeks to improve one's yoga practice. Microsensors embedded in the mat record and provide adjustments to the user in real time. Courtesy of SmartMat hide caption

itoggle caption Courtesy of SmartMat

The Johns Hopkins Applied Physics Lab created an electronic prosthetic hand and arm that has the same dexterity as a human arm. Electronic prosthetics are the biggest area of growth in this industry. Johns Hopkins Applied Physics Lab hide caption

itoggle caption Johns Hopkins Applied Physics Lab

Ouch! Jeffrey Craig Hopper got good emergency treatment after being hit in the eye with a baseball in June. But months later he was slapped with an extra medical bill he never expected. Jennifer Hopper hide caption

itoggle caption Jennifer Hopper

Volunteers pass out fresh vegetables for a Thanksgiving meal at the Alameda Food Bank in Alameda, Calif., in 2009. The percentage of Americans who report struggling to afford food has remained stubbornly near recession-era highs. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

David Quammen's new book is an extended excerpt of his previous one, Spillover, which explored how dangerous pathogens jump from animals to people. Courtesy of David Quammen hide caption

itoggle caption Courtesy of David Quammen