German Chancellor Angela Merkel uses a mobile phone during a meeting of the German federal parliament in Berlin, on Nov. 28, 2013. The country's labor minister supports a call that would prohibit employers from sending emails to employees after normal business hours. Michael Sohn/AP hide caption

Kiva robots maneuver around one of Amazon's newest distribution centers on Sunday in Tracy, Calif. Brandon Bailey/AP hide caption

Joyce Powell, 80, attends an exercise class at UT-Arlington with her husband, Thomas (right). Powell says she feels more confident in getting around and traveling since taking the classes. Dane Walters/KERA hide caption

With over 700 pages and 600 recipes, Mexico: The Cookbook, attempts to document exhaustively the country's varied regional cuisines. Recipes in the book include (from left): potato and chorizo tacos; divorced eggs with tomatillo sauce; and tikin-xik fish, a grouper dish from the Yucatan Peninsula. Courtesy of Fiamma Piacentini-Huff and Phaidon hide caption

At his trial, Elonis argued that he was only exercising his First Amendment free speech rights, which he also says he wrote on his Facebook page. iStockphoto hide caption

TFA at 25 years (from left): Matt Kramer, current co-CEO; Wendy Kopp, founder; Elisa Villanueva Beard, current co-CEO. Courtesy of TFA hide caption

People line the road to greet Sinterklaas, the Dutch version of Santa Claus, and his "Swarte Piet" (Black Pete) sidekicks in Amsterdam on Nov. 17, 2013. In the past few years, Black Pete has come under fire. Some say it's a beloved tradition that should remain; others say it is a racist stereotype. Peter Dejong/AP hide caption