An employee serves customers in a Chipotle restaurant in Washington, DC on September 9, 2015. Chipotle, the burrito chain whose rocketing growth has fast-food giants like McDonald's reeling, is not slowing down: it plans to hire 4,000 new staff in one go.
Andrew Caballero-Reynolds/AFP/Getty Images
National Geographic paleoartist John Gurche used fossils from a South African cave to reconstruct the face of Homo naledi, the newest addition to the genus Homo.
Photo by Mark Thiessen/National Geographic
Cage-free chickens in a barn near Hershey, Pa., get to roam and perch on steel rods, but they don't go outside. This week, McDonald's became the latest big buyer to demand cage-free eggs.
Migrants, mostly from Syria and Iraq, set out on foot along a highway on the Danish-German border, heading north to Sweden on Wednesday. They arrived that morning on a train from Germany.
CLAUS FISKER/AFP/Getty Images