Quentin Michael Allums

Entrepreneur, Writer, TEDx Speaker & Podcaster

Quyen Nguyen

Quyen Nguyen uses molecular probes that make tumors -- and just the tumors -- glow, as an extraordinary aid to surgeons.

R "Ray" Wang

Founder, Chairman & Principal Analyst at Constellation Research; Author of "Disrupting Digital Business"

R. Luke DuBois

Associate Professor of Integrated Digital Media, Music Technology, and Interactive Telecommunications

Rachel Botsman

Trust Expert, Lecturer at Oxford University & Author of "Who Can You Trust?"

Rachel Cargle

Public Academic, Writer, Lecturer

Rachel Kleinfeld

Democracy Advisor & Author

Rachel Simmons

Internationally Recognized Educator & Best-Selling Author

Rafael Yuste

Professor of Biological Sciences and Neuroscience at Columbia University

Raffaello D'Andrea

Entrepreneur, Engineer, Artist, Professor of Dynamic Systems and Control

Raghava KK

Raghava KK's paintings and drawings use cartoonish shapes and colors to examine the body, society, our world.

Rahul Mehrotra

Founder Principal of RMA Architects; Professor of Urban Design & Planning Harvard University’s Graduate School of Design

Rainn Wilson

Actor Known for "The Office" & Creator of SoulPancake

Soul Boom: Why We Need a Spiritual Revolution

Raj Patel

Award-Winning Writer, Food Politics Activist, Filmmaker & Academic

Rajiv Maheswaran

CEO of Second Spectrum, Providing Data Analysis for Sports; Former Research Assistant Professor at USC

Ramanan Laxminarayan

Drug-Resistance Economist, Founder & Director of the Center for Disease Dynamics, Economics & Policy (CDDEP)

Ramesh Raskar

Photography is about creating images by recording light. At the MIT media lab, professor Ramesh Raskar and his team members have invented a camera that can photograph light itself as it moves at, well, the speed of light.

Ramez Naam

Computer Scientist, Science Fiction Author & Co-Chair of Energy & Environment at Singularity University

Ramez Naam - Exponential Innovation | SingularityU Thailand Summit

Ramsey Musallam

Science Teacher, Adjunct Professor, Robotics Coach, Camp Director, TED Speaker & Author of "Spark Learning"

Randi Crawford

Owner of Randi Crawford Coaching, Entrepreneur & Jay Shetty Certified Life Coach