Paul Snelgrove

Paul Snelgrove led the group that pulled together the findings of the Census of Marine Life -- synthesizing 10 years and 540 expeditions into a book of wonders.

Cady Coleman

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

John Holdren

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

Bart Knols

Scientist, Author, Entrepreneur

Michael Archer

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

Susan G. Finley

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

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

Minhaj Chowdhury

Co-Founder & CEO, Drinkwell

Paul Sutter

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

Penelope Boston

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

Marcelo Gleiser

Theoretical Physicist at Dartmouth College

Mas Subramanian

Solid-State Chemist at Oregon State University,

James Green

Director of Planetary Science at NASA Headquarters

Stanley Love

NASA Astronaut & Planetary Scientist

Andy Weir

Science Fiction Author, Known for "The Martian"

Bobak Ferdowsi

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

Laurence Bergreen

Award-winning Biographer, Historian and Author of "Columbus: The Four Voyages" and "Over the Edge of the World: Magellan's Terrifying Circumnavigation of the Globe"

Alan Stern

Engineer, Planetary Scientist & Author

Jacqueline Goldin

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

David Grinspoon

American Astrobiologist, Senior Scientist at the Planetary Science Institute

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