Adam Gazzaley

Founder & Executive Director of Neuroscape; Professor in Neurology, Physiology and Psychiatry at UCSF

Adrian Grenier

Actor Known for HBO's "Entourage"; Environmental Activist; UN Ambassador

Alena Analeigh

Brown STEM Girl Founder; Youngest Person of Color Accepted into Medical School & Youngest NASA Intern

Alice Zhang

Co-Founder & CEO of Verge Genomics, A Company Utilizing AI to Improve the Lives of People with Alzheimer's & Parkinson's

Alok Sharma

British Politician Serving as President for COP26 and Minister of State at the Cabinet Office

Amanda Phingbodhipakkiya

Multidisciplinary Artist, Educator & Activist

Amy Abernethy

President, Product Development and Chief Medical Officer at Verily

Andrew Feustel

Geophysicist & Former NASA Astronaut

Andy Weir

Science Fiction Author, Known for "The Martian"

Angela Davis

Feminist, Social Activist, Professor & Writer

Abolition: Politics, Practices, Promises, Vol. 1

Ayana Elizabeth Johnson

Marine Biologist, Conservation Strategist, Founder & CEO of Ocean Collectiv

What If We Get It Right?: Visions of Climate Futures

Barney Graham, M.D., Ph.D

Immunologist, Virologist & Deputy Director of the Vaccine Research Center, at the National Institutes of Health

Bernard Harris

Former NASA Astronaut; President & CEO of Vesalius Ventures; First African-American to Perform a Spacewalk

Bill Stone

Robotics Engineer; Expedition Leader; CEO of Stone Aerospace; Expert in Cave Exploration & Innovative Diving Technology

Bjarne Stroustrup

Creator of C++

Boyan Slat

Inventor, Entrepreneur & Founder of The Ocean Cleanup

Cady Coleman

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

Caleb Harper

Executive Director of the Dairy Scale for Good Initiative

Net Zero Carbon Emissions Implementation on the Farm with Caleb Harper

Carlo Rovelli

Italian Theoretical Physicist & Writer

Charity Dean

CEO & Founder at PHC Global

Dr. Charity Dean - News Channel 3-12 Story