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

Jacqueline Goldin

Extraordinary Associate Professor of Anthropology & Water Science at the University of Western Cape

Peter Girguis

Associate Professor of Natural Sciences at Harvard; Adjunct Research Engineer at the Monterey Bay Aquarium Research Institute

Penelope Boston

Speleologist; Associate Director of the National Cave and Karst Research Institute

Bart Knols

Scientist, Author, Entrepreneur

Andrew Connolly

Astronomer

Anil Ananthaswamy

Award-Winning Science Writer & Author of "The Edge of Physics"

Ellen Stofan

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

Peter Cattermole

Former Principal Investigator with NASA's Planetary Geology and Physics Program, Specialising on the Study of Volcanoes on Mars and Venus

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.

Paul Sutter

Astrophysicist; Host of “Ask a Spaceman” Podcast; Contributing Editor to Space.com; Producer

Konstantin Batygin

Professor of Planetary Science, Caltech

David Grinspoon

American Astrobiologist, Senior Scientist at the Planetary Science Institute

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

Monica Grady

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

Dr. Phil Plait

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

Bobak Ferdowsi

NASA's Jet Propulsion Labs Flight Director; Curiosity Rover Landing

Mario Livio

Renowned Astrophysicist, Lecturer, and Best-selling Author

John Holdren

Professor of Environmental Policy & Director of the Program on Science, Technology, and Public Policy at the Harvard Kennedy School of Government

Eric Berlow

Data Ecologist, Complexity Scientist