"What I'm saying is that culturally we need a much better balance. We need more of a yin and yang between [introverts and extroverts]." - Susan Cain James Duncan Davidson/TED hide caption

itoggle caption James Duncan Davidson/TED

This Chinese teenager weighs 353 pounds. At a "slimming center" in China's central Hubei province, he's exercising and undergoing acupuncture to lose weight. Color China/AP hide caption

itoggle caption Color China/AP

Hiroshi Shimizu, senior vice president of global quality assurance at Japanese air bag maker Takata, apologizes for the failure of the defective devices on Capitol Hill in Washington on Thursday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

When beverage companies like Pepsi create ad campaigns with stars like Beyonce, they're trying to appeal to youth, says Jennifer Harris of the Rudd Center for Food Policy & Obesity. Walter McBride/Corbis hide caption

itoggle caption Walter McBride/Corbis

Olmo Maldonado (center) returned to his hometown of McAllen, Texas, despite the low employment rate for millennials. Hansi Lo Wang/NPR hide caption

itoggle caption Hansi Lo Wang/NPR

Noelle Johnson has a lengthy commute via bus and train to her job near Washington, D.C. She's been working toward her B.A. for nine years, and when she finally finishes, she says, she'll be able to afford to live closer to work. James Clark/NPR hide caption

itoggle caption James Clark/NPR