Ellen Stofan

Under Secretary for Science & Research at the Smithsonian; Former Chief Scientist at NASA

Pamela Melroy

Retired Air Force Officer & Former NASA Astronaut

From Star Trek Posters to NASA: The Journey of Pamela Melroy '83

Salima Ikram

Archaeologist; professor of Egyptology at the American University in Cairo

Susan Kieffer

Geologist & Planetary Scientist; Walgreen Chair and Center for Advanced Study Professor of Geology and Physics

Raha Hakimdavar

Space & Environment Strategist, Earth Scientist & Founder & CEO of Zyon Space, a Climate-Tech Startup; Senior Advisor, Water, Climate, & Innovation at Georgetown University in Qatar

Dr. Kirby Runyon

Space Exploration Leader & Zero Gravity Coach and Planetary Geologist, CEO of Planex.space

The Overview Effect at Home: Exploring Otherworldly Terrain With Space Tourists on Earth

Sandra Magnus

American Engineer and Former NASA Astronaut; Principal at AstroPlanetview, LLC

Jessica Watkins

NASA Astronaut; First Black Woman on International Space Station Crew

Serena Auñón-Chancellor

NASA Astronaut, Associate Professor of Clinical Medicine at Louisiana State University Health Sciences Center & Program Director for Aerospace Medicine Residency Program at UTMB

David Grinspoon

American Astrobiologist, Senior Scientist at the Planetary Science Institute

Venus Revealed: A New Look Below The Clouds Of Our Mysterious Twin Planet

Ayanna Howard

Pioneering Innovator, Entrepreneur & Inventor of Robotic Technologies & Artificial Intelligence; Dean of the College of Engineering, The Ohio State University

Sex, Race, and Robots: How to Be Human in the Age of AI

Susan G. Finley

Longest-Serving Woman in NASA, Employee of NASA's Jet Propulsion Laboratory (JPL)

Monica Grady

British Space Scientist; Professor of Planetary and Space Science at the Open University; Chancellor of Liverpool Hope University

Karen E. Bender

Author, Professor, Editor; Known for short story collection "Refund"

Emily Calandrelli

Aerospace Engineer; Host & Producer of FOX's "Xploration Outer Space"

Cady Coleman

Former NASA Astronaut; Retired U.S. Air Force Officer & Chemist

Julie Guthman

Author & Professor of Social Sciences at the University of California, Santa Cruz

Courteney Monroe

CEO of National Geographic Global Networks

Dr. Barbara Fredrickson

Leading Researcher on Positive Emotions & How Cultivating Positivity can Change our Relationships, our Cells, and our Outlook on Life

Sharon Epperson

Personal Finance Expert for CNBC, Multimedia Journalist, Adjunct Professor & Motivational Speaker

Susan Fiske

Professor of Psychology at Princeton University

Caroline Buckee

Assistant Professor at Harvard School of Public Health, Malaria Research

Dr. Hendrik Poinar

Evolutionary Biologist Specializing in Ancient DNA

Michael Archer

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

Jennifer Pharr Davis

Long-Distance Hiker & Author; Overall Record Holder on the Appalachian Trail & The First Woman to Set That Mark

Outdoor School: Hiking and Camping: The Definitive Interactive Nature Guide

Amy Finkelstein

Professor of Economics Massachusetts Institute of Technology

Vanessa Ochs

Author of "Inventing Jewish Ritual", Winner of 2007 National Jewish Book Award, Professor of Religious Studies at University of Virginia

Dr. Aida Giachello

Professor at Northwestern University School of Medicine; Chronic Diseases, Tobacco Control & Racial Health Disparities Researcher

Anja Manuel

Co-Founder and Partner, RiceHadleyGates LLC, Author of "This Brave New World: India, China and the United States"

Victoria Pope

Deputy Editor, National Geographic Magazine.