Snap: Evan Spiegel

In 2001, when most of us had no idea what it meant to "go viral," Jonah Peretti shared an email prank among his friends — and saw it spread to millions. That began his fascination with how information spreads, and set him on the path to launch two of the most powerful media organizations of the Internet age: The Huffington Post and BuzzFeed. Recorded live in New York City.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

27 Heinä 201748min

We're hard at work planning our upcoming live shows, so we bring you this favorite from the last year: Samuel Adams. In 1984, Jim Koch felt suffocated by his cushy but boring corporate job. So he left, dusted off an old family beer recipe, started Sam Adams, and helped kickstart the craft beer movement in America. PLUS in our postscript "How You Built That," we check back with Kaitlin Mogental who is making packaged snacks out of the leftover fruit and veggie pulp from LA juice bars. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

24 Heinä 201736min

Cotton muslin baby blankets are commonplace in Australia, where Raegan Moya-Jones grew up. But when she started a new life and family in NYC, she couldn't find them anywhere. She was sure Americans would love muslin blankets as much as Australians. So in 2006, she started the baby blanket company Aden + Anais, which now makes more than $100 million in annual revenue. PLUS in our postscript "How You Built That," how Sam Boyd created Guided Imports, a middleman business to help entrepreneurs find manufacturing and production solutions ... in China. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

17 Heinä 201742min

After being involved in Berkeley's Free Speech Movement, Jann Wenner wanted to start a publication to capture the exploding counterculture scene of the 1960s. The result was Rolling Stone, a gritty music magazine that – for 50 years — has left an indelible mark on rock music and journalism. PLUS in our postscript "How You Built That," how Cleveland resident Joel Crites created the app Micro Fantasy, a game where fans can make mini-predictions about what will happen next during a baseball game. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

10 Heinä 201746min

We're hard at work planning our upcoming live shows, so we bring you this favorite from the last year: Spanx. At 27, Sara Blakely was selling fax machines and desperate to reinvent her life. So she came up with Spanx — hosiery that eliminates panty lines — and set to work building her business. PLUS in our postscript "How You Built That," we check back with Chandra Arthur of the friend-matching app Friendish, and how it was recently featured on the show, Planet of the Apps. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

3 Heinä 201729min

In 1997, Navy SEAL Randy Hetrick was deployed in Southeast Asia, where he was stationed in a remote warehouse for weeks with no way to exercise. So he grabbed an old jujitsu belt, threw it over a door, and started doing pull-ups. Today, TRX exercise straps dangle from the ceiling in gyms across the country and are standard workout gear for professional athletes. PLUS in our postscript "How You Built That," how Whitney Sokol created SproutFit — adjustable onesies and leggings that grow with your baby. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

26 Kesä 201743min

In 2007, architect Miguel McKelvey convinced his friend Adam Neumann to share an office space in Brooklyn. That was the beginning of WeWork: a shared workspace for startups and freelancers looking for an inspiring environment to do their work. Today, WeWork has created a "community of creators" valued at nearly $16 billion. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

19 Kesä 201747min

Lisa Price worked in television but had a passion for beauty products. At her mother's suggestion, she began selling her homemade moisturizer at a church flea market. Twenty years later, Carol's Daughter is one of the leading beauty brands catering to African-American women. PLUS in our postscript "How You Built That," how professional trumpet player Dan Gosling created a special lip balm for musicians called ChopSaver. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

12 Kesä 201741min