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Molecular biologist Randy Sheckman, who shared the 2013 Nobel Prize in physiology or medicine, acknowledges applause after receiving his prize during the ceremony in Stockholm last December. Pascal Le Segretain/Getty Images hide caption
New York City police officers stand guard in Times Square earlier this month after a blog affiliated with the so-called Islamic State militants mentioned the area as a target for bombing. Andrew Burton/Getty Images hide caption
Biohazard suits used to handle dangerous microbes hang in a laboratory at the U.S. Army Medical Research Institute of Infectious Diseases in Fort Detrick, Md. Patrick Semansky/AP hide caption
Lab equipment and research grants don't grow on trees. ImageZoo/Corbis hide caption
The French enjoy horse meat — here's a horse meat butcher in Paris. But even the French were angry that they had been paying beef prices for it last year. Thomas Coex/AFP/Getty Images hide caption
A World Health Organization worker trains nurses how to use Ebola protective gear in Freetown, Sierra Leone. Michael Duff/AP hide caption
This grocery store packet of porcini mushrooms contained a surprise: three species of fungi never before named or described. Bryn Dentinger/Royal Botanical Gardens, Kew hide caption
No amount of training can undo the violence someone experienced at home as a child, but it can help break the cycle. Pamela Albin Moore/iStockphoto hide caption
Mammuthus columbi, the Columbian mammoth, used to be common in America, but went extinct about 10,000 years ago. The specimen found south of Dallas is estimated to be 20,000 - 40,000 years old. Illustration by Karen Carr/Perot Museum of Nature and Science hide caption