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30 Under 30: In Video Show Us What You've Got. That's what we asked our 30 Under 30 candidates to do this year. And did they ever.

Seth Priebatsch , a lanky 22-year-old in a fireball-orange polo with matching orange wraparound shades perched on his crown, bounded onto the stage to deliver the first keynote speech at South by Southwest this year.

While working at Facebook in 2009, Adam D'Angelo and Charlie Cheever had a question: Why isn't there a place on the Internet where a question can be answered by someone who actually knows the answer? That question led the pair to start Quora , a Q&A website that allows users to share knowledge. You can pose a question, answer a question, and edit others' answers

This year Jessica Mah , CEO of inDinero , a maker of online money-management tools for small businesses, moved her company into a new office on the 9th floor of a downtown San Francisco high rise. She fired an employee, and hired a customer service manager. She sometimes worked 80 hours a week and ate dinner her office.

In April, University of Pennsylvania hosted the 15th annual Wharton India Economic Forum, an elite conference on growth opportunities in India. Among the attendees, who were predominately of Indian descent, was Adam Sachs, a 28-year-old Jewish kid from New Jersey. As it turns out, Sachs' two-year-old start-up, a group dating website called Ignighter.com , is one of the hottest new websites in India.

Matthew Corrin's aha moment came one afternoon six years ago in a Midtown Manhattan deli.

What do hundreds of dollars worth of parking tickets, people cued up on Southern California streets, and Vietnamese Banh Mi sandwiches all have in common?

Featured Articles How Cool is This? The definition of cool is constantly in flux.

They're making the hottest apps on your iPhone, and shirts that don't gap; encouraging you to eat healthier, and date smarter; fighting government censorship, and those extra pounds on your thighs; helping impoverished women worldwide, and kids at New Orleans charter schools. Where else would you find a more awesome and diverse group of young entrepreneurs than right here on our 30 Under 30 Coolest Entrepreneurs list? Jinnett, a professional ballerina who danced in Black Swan, wanted to help mere mortals who longed for dancer-like bodies

Some people are natural-born speakers. They were those eager young souls who volunteered to read aloud in grade school and now welcome any opportunity to present in front of a group

Before settling on a name, consider these five traits that all great company names share. While a clever and appropriate name can impress your fan base, choosing an unoriginal, dull name communicates a lack of enthusiasm towards your new business venture.

Wieden + Kennedy epic "connected emotionally," edges out Puma To the surprise of no one, Nike’s Write the Future , a cinematic tour de force from Wieden + Kennedy Amsterdam and director Alejandro Gonzalez Inarritu won the Grand Prix in the Film category at Cannes. It may surprise some to know how close a call it was, though. There was, according to jury chair Tony Granger, global chief creative officer at Y&R, “a lot of deliberation and re-voting” among film jurors around two top contenders for the big prize--Write the Future and After Hours Athlete, a gorgeous dark horse from agency Droga5 for Puma.

Hacker conference DEF CON is, in information-security circles, a big deal--which is why it's pretty astonishing that in August it will launch its first event targeted at the younger hacker . You know, the kind who's still in school and may not yet be old enough to drive, but is quite adept at managing SQL injections, DDoS, and password cracking. The kind of hacker who may be as young as 8

This week Apple's COO and acting CEO Tim Cook was apparently spotted sauntering into the Beijing offices of China Mobile , the world's largest cellphone network, with 611 million subscribers (that's almost twice the number of people living in the U.S. ). As a result, analyst Brian White at Ticondera Securities suggested that Apple's poised to launch an iPhone whose price would appeal to the average Chinese smartphone user

This may surprise many U.S. consumers unfamiliar with Ikea spots, but the legendary Swedish furniture company is this year's Advertiser of the Year at the Cannes Lions International Festival of Creativity. In a series of videos, Filip Nilsson, chief creative officer at Forsman & Bodenfors, explains his shop's approach--and offers insights into its massive appeal