Elizabeth "Zibi" Turtle has devoted her career to exploring our solar system's nearby worlds. Her latest project is Dragonfly, a robotic rotorcraft-lander designed to explore Titan, Saturn's largest moon.

Dustin Schroeder develops and uses geophysical radar to study Antarctica, Greenland and the icy moons of Jupiter.

Monika Bulaj’s stunning, painting-like photographs blur religious and cultural divisions, exploding stereotypes. She is a TED Fellow.

Under the label Laokoon, Hans Block develops films, theatre productions, essays, lecture performances and radio plays that deal with the question of how our idea of humans and society change or can be transformed in the digital era.

Under the label Laokoon, Moritz Riesewieck develops films, theatre productions, essays, lecture performances and radio plays that deal with the question of how our idea of humans and society change or can be transformed in the digital era.

Engineer and daredevil cave explorer Bill Stone is obsessed with discovery -- on Earth and beyond.

Vincent Cochetel is the Director of the Bureau for Europe at the United Nations High Commissioner for Refugees (UNHCR).

Dr. Erin Marie Saltman manages Facebook's counterterrorism and counter-extremism policy work for Europe, the Middle East and Africa.

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

George Papandreou draws on lessons learned from the Greek debt crisis as he helps guide the EU through difficult waters.

Karoli Hindriks is the CEO and founder of Jobbatical, a platform on a mission to make immigration smart.

Barcelona-based architect Xavier Vilalta works in Europe, Africa and the Middle East. He adopts and updates traditional design principles to construct modern buildings that truly suit their environment.

From his home base in Bulgaria, Ivan Krastev thinks about democracy -- and how to reframe it.

Georgette Mulheir is a pioneer for the movement to end child abuse in the form of orphanages.

BCG's Amane Dannouni explores how technology impacts established business models and how digital enablers can unlock greater economic and social value.

Hubertus Knabe studies the history of torture, oppression and surveillance in former East Germany.

Yanis Varoufakis thinks we need a radically new way of thinking about the economy, finance and capitalism.

David Baron writes about science in books, magazines, newspapers and for public radio. He formerly served as science correspondent for NPR and science editor for PRI’s The World.

Indie newcomer Sophie Hunger's haunting vocals -- at once fragile and soulful -- carried her wistful, blues-dappled acoustic folk from intimate cafe appearances to extraordinary word-of-mouth success and cross-Europe tours.

James Thornton is an authority on the power of the law to create change and the founder of ClientEarth, a nonprofit law firm using advocacy and litigation to address the climate crisis.

Alexandra Auer designs interactive experiences in physical environments.

Pulitzer Prize-winning journalist Alison Killing uses satellite imagery and architectural techniques to investigate urgent social issues.

Dan Cobley is a marketing director at Google, where he connects customers and businesses, helping both navigate digital space to find what they need.

Dominic Price is a work futurist with the desire to make the world a better place.

Hal Harvey works with policymakers to develop a clean energy future.

BCG's Rocío Lorenzo advises telecommunication and media companies on their strategy and how to transform their businesses in times of digital disruption.

John Biewen directs the audio program at the Center for Documentary Studies at Duke University, where he produces the Center's Peabody-nominated documentary podcast, Scene on Radio.

Yasin Kakande is exposing the human rights abuses of migrant workers in the Middle East.

Journalist Misha Glenny leaves no stone unturned (and no failed state unexamined) in his excavation of criminal globalization.

At the Center for Health and the Global Environment, Kristie Ebi studies and develops interventions to help at-risk populations deal with climate change.