Anthony Magliano and Mica Thomas are the founder and artistic directors of Quixotic, a mixed-media theater/performance/aerialist company.

Vishaan Chakrabarti believes that cities -- if they are designed to be sustainable, equitable and joyous -- are the last and best hope for humanity.

TED Fellow Andrew Bastawrous studies eye health -- and builds accessible new tools to bring eye care to more people.

Stacey Baker assigns photography for the wide-ranging vision of the weekly New York Times Magazine.

Yvonne van Amerongen is an occupational therapist and a social worker.

As Director of Stanford’s Artificial Intelligence Lab and Vision Lab, Fei-Fei Li is working to solve AI’s trickiest problems -- including image recognition, learning and language processing.

Margaret Mitchell is a senior research scientist in Google's Research & Machine Intelligence group, working on artificial intelligence.

Supasorn Suwajanakorn works on ways to reconstruct, preserve and reanimate anyone -- just from their existing photos and videos.

Yann LeCun is chief AI scientist at Facebook and Silver Professor at New York University.

Believing that architects should envision and build the future, Ma Yansong develops advanced designs that interpret an Eastern affinity for nature within a contemporary fashion.

A teacher, writer and member of the Kenyan parliament, Joseph Lekuton has an inspiring vision for Kenya.

Andreas Ekström describes the power structures of the digital revolution.

A living legend, Frank Gehry has forged his own language of architecture, creating astonishing buildings all over the world, such as the Guggenheim in Bilbao, the Walt Disney Concert Hall in LA, and Manhattan's new IAC building.

Richard Baraniuk founded Connexions -- now called OpenStax -- a free, open-source, global clearinghouse of course materials. Students and educators tap into its vast store of texts on everything from engineering to ornithology to music, adapting the content as they see fit.

Russell Foster studies sleep and its role in our lives, examining how our perception of light influences our sleep-wake rhythms.

Dan Barber is a chef and a scholar -- relentlessly pursuing the stories and reasons behind the foods we grow and eat.

David Lindell develops next-generation algorithms and systems for imaging the world in 3D.

Thulasiraj Ravilla is the executive director of the Lions Aravind Institute of Community Ophthalmology, helping eye-care hospitals around the world build capacity to prevent blindness.

Hannah Bürckstümmer has a vision for sustainable buildings and how organic solar cells can make it real.

Computer scientist Michael Rubinstein and his team have developed a "motion microscope" that can show video footage of barely perceivable movements, like breaths and heartbeats.

Lalitesh Katragadda builds tools that help groups of people compile information to build something greater than the sum of its parts. His latest fascination: collaborative maps.

Nitish Padmanaban designs systems that combine optics and computation to help improve visual perception.

Ursula von der Leyen believes that green and digital transformations hold the key to Europe's future prosperity and resilience.

Ghanaian Fred Swaniker founded a school and a leadership network to educate and support the next generation of Africa’s leaders.

Amber McReynolds's vision is to create election systems that put voters first and improve the voting experience for all.

Liz Coleman radically remade Bennington College in the mid-1990s, in pursuit of a new vision: higher education as a performing art.

Embracing both genetically improved seed and ecologically based farming methods, Pamela Ronald aims to enhance sustainable agriculture.

Joseph Redmon works on the YOLO algorithm, which combines the simple face detection of your phone camera with a cloud-based AI -- in real time.

Ryan Gravel is an architect and urban planner who played a key role in developing the Atlanta BeltLine.

TED Fellow Moriba Jah studies and predicts the motion of objects in space in an effort to make space safe, secure, and sustainable.