Could a countdown to death help you lead a more ecstatic life? Daniel Horowitz for NPR hide caption

itoggle caption Daniel Horowitz for NPR

People drew maps of body locations where they feel basic emotions (top row) and more complex ones (bottom row). Hot colors show regions that people say are stimulated during the emotion. Cool colors indicate deactivated areas. Image courtesy of Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen. hide caption

itoggle caption Image courtesy of Lauri Nummenmaa, Enrico Glerean, Riitta Hari, and Jari Hietanen.
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A technique called optogenetics is being used in the laboratory to observe and control what brain circuits are doing in real time. Henning Dalhoff/Getty Images/Science Photo Library RM hide caption

itoggle caption Henning Dalhoff/Getty Images/Science Photo Library RM

Knee pain is common, but surgery isn't necessarily the answer, researchers say. Inna Jacquemin/iStockphoto hide caption

itoggle caption Inna Jacquemin/iStockphoto

Martine Rothblatt, CEO of United Therapeutics, is the namesake of the company's latest drug, Orenitram. Ron Levine/Getty Images hide caption

itoggle caption Ron Levine/Getty Images

Dr. Ernest Bagner III stands outside his former office tucked in the back corner of a strip mall in Hollywood, Calif., where he says he was the victim of Medicare fraud. Jonathan Alcorn/ProPublica hide caption

itoggle caption Jonathan Alcorn/ProPublica

When Benta Odeny was diagnosed with HIV, she started to protect her husband Daniel from the virus by taking antiretroviral medications. The same drugs also helped her give birth to an HIV-negative daughter, Angelia. Gregory Warner/NPR hide caption

itoggle caption Gregory Warner/NPR

Not covered by Obamacare, but still sweet. Cristian Baitg/iStockphoto hide caption

itoggle caption Cristian Baitg/iStockphoto

Before you have get a new hip, you might want to check the government's list of best and worst hospitals for the operation. iStockphoto hide caption

itoggle caption iStockphoto

A simulated patient at the University of Malaya makes use of different materials to mimic the look and feel of human tissue. /Courtesy of Vicknes Waran hide caption

itoggle caption /Courtesy of Vicknes Waran

Rheanna Kathleen Morris hugs her mom, Peggy Sinclair-Morris. Jenny Gold for NPR hide caption

itoggle caption Jenny Gold for NPR