Penny Chisholm

Award-Winning Oceanographer & Professor, MIT

Professor Penny Chisholm on Earth Week

David J. Brenner

Director of the Columbia University Center for Radiological Research

Michael Bodekaer

Technology Entrepreneur & Founder of Labster

Michael Archer

Paleontologist Michael Archer is working to bring back his favorite extinct animal: the Tasmanian tiger.

Molly Crockett

Globetrotting Neuroscientist investigating altruism, morality and economic decision-making.

Mitch Resnick

Mitchel Resnick is LEGO Papert Professor of Learning Research, Director of the Okawa Center, and Director of the Lifelong Kindergarten group at the MIT Media Lab.

Tyler DeWitt

Research Scientist; High School Teacher, Digital Content Author & STEM Education Advocate

Katherine Kuchenbecker

Assistant Professor in the Mechanical Engineering and Applied Mechanics Department, with membership in the Bioengineering Graduate Group at the University of Pennsylvania.

Michael Stevens

YouTube Sensation; Best Known as Vsauce

Mina Bissell

Iranian-American Biologist; Known for her Research on Breast Cancer

Bunker Roy

Founder of Barefoot College

Dr. Phil Plait

Blogger for Discover Magazine at Bad Astronomy, where he deconstructs misconceptions and explores the wonder of the Universe.

Jessica Ochoa Hendrix

Education Activist & Entrepreneur

Paul McEuen

John A. Newman Professor of Physical Science & Director of the Kavli Institute at Cornell for Nanoscale Science

Po-Shen Loh

Founder of Expii & National Math Olympiad Team Coach

Watson Hartsoe

Ethnographer, Designer, Educator; Genesis STEAM

Kevin Delaney

Performer, Playwright & Educator; Former Host of "Street Science" on the Science Channel

Hector Garcia

Clinical Psychologist & Author Specializing in Combat-Related PTSD

Wilton Virgo

Laser Spectroscopist & Author of "Quantum Mechanics in Everyday Life"

Cindy Moss

Director of Global STEM Initiatives for Discovery Education

Carl Wieman

Physicist and Educationist at Stanford University and Recipient of the Nobel Prize in Physics

Eduardo Briceño

Founder & CEO at Growth.how, Former CEO of Mindset Works, Facilitating a Growth Mindset

Janet Iwasa

Molecular Animator & TED Fellow

Jon Bergmann

Pioneer of the Flipped Class Movement & Bestselling Author of "Flip Your Classroom"; Member of the TED-Education Advisory Board

Dr. Scott Fraser

Forensic Psychologist

Apollo Robbins

Sleight-of-Hand Artist and Self-Described Gentleman Thief & Deception Specialist

Marla Spivak

Entomologist; Focused on Practical Applications to Protect Honey Bee Populations

Lisa Kristine

Internationally Recognized Fine-Art Photographer, Humanitarian & Activist

Colin Stokes

The director of communications for the non-profit Citizen Schools, Colin Stokes thinks deeply about the media he shares with his two young children.

Laura Snyder

Professor; Science Historian; Philosopher; Author of "The Philosophical Breakfast Club"