A shark warning is displayed near Gracetown, Western Australia, in November. An Australian man was killed by a shark near the area that month, sparking a catch-and-kill order. Rebecca Le May/EPA/Landov hide caption

itoggle caption Rebecca Le May/EPA/Landov

Villages in the Lower Shire valley of Malawi, like this one named Jasi, rely heavily on subsistence farming and steady rainfall, and are struggling to produce steady harvests. Jennifer Ludden/NPR hide caption

itoggle caption Jennifer Ludden/NPR

Even when a flood obliterates homes, as Superstorm Sandy did in 2012 in the Rockaway neighborhood of Queens, N.Y., the urge to rebuild can be strong. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images

Each bottle of Champagne contains around 50 million bubbles. But will any of them accelerate the inebriation process? Victor Bezrukov/Flickr.com hide caption

itoggle caption Victor Bezrukov/Flickr.com

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.