Retailers' Black Friday ads and other parts of the holiday season are designed to tap into a very ancient part of our brains. Paul J. Richards/AFP/Getty Images hide caption

itoggle caption Paul J. Richards/AFP/Getty Images

A 2015 F-150 rolls off the assembly line at the Dearborn Truck Plant in Dearborn, Mich. The aluminum-sided F-150 could set a new industry standard — or cost the company its pickup truck crown. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Job hunters line up for interviews at an employment fair in New York City. The unemployment rate tells only a partial story about the U.S. labor market. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP

The 2002 Honda CR-V is one of dozens of car models subject to a recall for faulty air bags. The air bag manufacturer, Takata, supplies bags for more than 30 percent of all cars and is one of only three large air bag suppliers. Insurance Institute for Highway Safety/AP hide caption

itoggle caption Insurance Institute for Highway Safety/AP

Sales of traditional hybrids, plug-ins and all-electric cars are down about 5 percent in 2014 — while truck and SUV sales have jumped. Mark Ralston/AFP/Getty Images hide caption

itoggle caption Mark Ralston/AFP/Getty Images