TED Fellow Lei Li is improving medical imaging that can track the progress of diseases, such as cancer, that can otherwise go undetected.

Leah Buechley is an MIT electronics designer who mixes high and low tech to create smart and playful results.

Lindy Lou Isonhood served as Juror No. 2 on a capital murder trial in 1994 -- an experience that changed her life.

Mary Lou Jepsen pushes the edges of what's possible in optics and physics, to make new types of devices, leading teams and working with huge factories that can ship vast volumes of these strange, new things.

A professor of chemistry, nanoscience and chemical complexity, Lee Cronin and his research group investigate how chemistry can revolutionize modern technology and even create life.

Louie Schwartzberg is a cinematographer, director and producer who captures breathtaking images that celebrate life -- revealing connections, universal rhythms, patterns and beauty.

Researcher Johnny Lee became a YouTube star with his demo of Wii Remote hacks -- bending the low-cost game piece to power an interactive whiteboard, a multitouch surface, a head-mounted display ...

Jinha Lee wants to weave digital computing into the flow of our physical reality.

Euna Lee strives to be a voice for the voiceless and a window for those with no access to outside information.

William Li heads the Angiogenesis Foundation, a nonprofit that is re-conceptualizing global disease fighting.

As a child growing up in North Korea, Hyeonseo Lee thought her country was the "best on the planet." It wasn't until the famine of the 90s that she began to wonder. She escaped the country at 17-years-old to begin a life in hiding as a refugee in China. Hers is a harrowing, personal tale of survival and hope -- and a powerful reminder of those who face constant danger, even when the border is far behind.

In his groundbreaking work, Xu Liu investigated how to activate and deactivate specific memories in mice.

Lee Smolin is a theoretical physicist, working mainly in the field of quantum gravity. He's a founding member of the Perimeter Institute for Theoretical Physics in Canada, and the author of The Trouble With Physics.

As CEO of Citizen University, Eric Liu is working to spark a civic revival in the US and beyond.

After a career building new products and founding the innovation programs at two Fortune 200 companies, David Lee has learned a lot about what works and what doesn’t when trying to get large, established companies to embrace innovation.

Shannon Lee’s mission is to provide access for people to Bruce Lee’s philosophy through education and entertainment.

Ani Liu explores the intersection between technology and sensory perception.

Jiabao Li augments human sensation with her wearables and interactive installations, raising questions about technology's influence on perception, identity and emotion.

Kang Lee has devoted his career to understanding the development of social cognition and behavior.

Leah Georges is a professor and researcher who works with organizations to pull apart the enduring fable of generations at war in the workplace.

At the University of Pennsylvania, Angela Lee Duckworth studies intangible concepts such as self-control and grit to determine how they might predict both academic and professional success.

TED Fellow Laura L. Dunn advances and enforces victims' rights for survivors of gender violence in campus, criminal and civil legal systems.

Lee Mokobe is a 20-year-old South African slam poet and co-founder of Vocal Revolutionaries.

Gary Liu is CEO of the South China Morning Post, a leading news media company that has reported on China and Asia for more than a century.

Jinsop Lee is an industrial designer who believes that great design appeals to all five senses.

Tim Berners-Lee invented the World Wide Web. He leads the World Wide Web Consortium (W3C), overseeing the Web's standards and development.

Julieanna L. Richardson has a diverse background in theatre, television production, and the cable television industry that created a unique path to founding and heading up the largest national collection effort of African American video oral histories on record since the WPA Slave Narratives. T

Leah Chase spent seven decades serving her signature gumbo and hospitality to everyone from Martin Luther King Jr. to James Baldwin to Barack Obama.

Hongqiao Liu is an independent journalist and policy advisor who has been covering China’s environmental crisis and decarbonization since 2010. She writes Shuang Tan, a newsletter in which she decodes China’s climate and energy policies for the world.

Ingrid Fetell Lee studies joy and reveals how we can find more of it in the world around us.