Dennis Dimick

Former Executive Environment Editor at National Geographic Magazine

Bill Gates

Co-Founder of Microsoft; Co-Chair of the Bill & Melinda Gates Foundation

Jane Lynch

Emmy Award-Winning Actress, Known for "Glee" and Hosting "Hollywood Game Night"

They Might Be Giants

Geek-Pop Maestros; Alternative Rock Group

Bob Schieffer

Former Moderator of “Face The Nation” & Chief Washington Correspondent for CBS News

Jim Belushi

Actor, Comedian & Musician

Laurie Garrett

One of America's Premier Authorities on Healthcare and Disease Prevention

John Grisham

Lawyer Turned Best-Selling Author; "A Time to Kill"

Stephen Breyer

Former Associate Justice of the Supreme Court of the United States

A look at Justice Stephen Breyer's career and opinions on the bench

Alan Cooper

Software Designer and Author, Known for Humanizing Technology

Raffaello D'Andrea

Entrepreneur, Engineer, Artist, Professor of Dynamic Systems and Control

Erin Burnett

News Anchor for "OutFront" Nightly News; Chief Business and Economics Correspondent for CNN

Max Levchin

CEO, Affirm; Co-Founder of PayPal

Anant Agarwal

CEO of edX & Professor at MIT

Christy Turlington Burns

Model & Founder of Every Mother Counts; Anti-Smoking Activist

Davis Guggenheim

Academy Award-Winning Director & Producer Known for "He Named Me Malala," "An Inconvenient Truth," "Waiting for Superman" & "Still: A Michael J. Fox Movie"

Salt-N-Pepa

Grammy Award-Winning Hip-Hop & Rap Girl Group Known for "Push It"

Mario Batali

Host of "Molto Mario"and "Ciao America", Iron Chef on "Iron Chef America", Food Network

Bob Vila

Home Improvement Expert; Former Host of "This Old House" and "Bob Vila's Home Again," Among Other Shows

Oscar Arias

Former President of Costa Rica & Nobel Laureate