Mike (left) and Matt (right) Gragnani are 25-year-old identical twins. Together, they've been able to buy an apartment and start a business before many of their peers. Courtesy of Mike Gragnani hide caption

itoggle caption Courtesy of Mike Gragnani

Medical residents including Dr. Amy Ho (bottom right) helped with first aid at the Pitchfork Music Festival in Chicago. Courtesy Amy Ho hide caption

itoggle caption Courtesy Amy Ho

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

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More than 65 percent of first marriages today are between couples already living together. For millennials, cohabitation is almost a rite of passage. Oliver Hoffmann/iStock hide caption

itoggle caption Oliver Hoffmann/iStock

We asked you to send in your embarrassing instant messenger handles from days gone by. Thanks for sharing, Blondsoccerplyr, AgentGiggleChunk and absofsteel3616! iStockphoto hide caption

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The phone company Vonage reported a drop in voice mail retrievals over the past year. Many of those ignoring voice mails are millennials. iStockphoto hide caption

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Phillip Underwood and Michelle Sheridan and their children, Logan and Lilliana, gather in their living room in Frederick, Md., after a long day of work and school. The couple had delayed marriage, in part for financial reasons. James Clark/NPR hide caption

itoggle caption James Clark/NPR

Millennials are often painted as the entitled, selfie-snapping generation. But many researchers say that "me" time will help young people make better decisions in the long run. © Eugenio Marongiu/iStockphoto hide caption

itoggle caption © Eugenio Marongiu/iStockphoto

Millennials seem to prioritize the environment, but may want to dissociate from the "treehugger" baggage of the term "environmentalist." Getty Images hide caption

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Rapper Lil Jon appears in a new ad for Rock the Vote's 2014 campaign. The organization was founded to get Generation X engaged in politics, and is adapting its tactics to reach millennials. Courtesy of Rock the Vote hide caption

itoggle caption Courtesy of Rock the Vote