David Mizejewski

National Wildlife Federation Naturalist and Media Personality

Bindi Irwin

Wildlife Conservationist & Daughter of "The Crocodile Hunter" Star Steve Irwin; Season 21 Contestant on "Dancing With the Stars"

Jack Hanna

Naturalist, Adventurer & Director Emeritus of the Columbus Zoo

Ed Begley Jr.

Actor & Environmental Activist

Dyan "The Penguin Lady" deNapoli

Penguin Expert, TED Speaker, & Award-Winning Author of "The Great Penguin Rescue"

Dr. Jane Goodall

Internationally Renowned Primatologist; Founder of the Jane Goodall Institute; UN Messenger of Peace

Reason for Hope: A Spiritual Journey

Sophia Bush

Actress, Humanitarian & Author; Known for "One Tree Hill"

Cesar Millan

Host of The Dog Whisperer; Author of Cesar's Way

Dr. Tierney Thys

Marine Biologist Who Studies the Mola Mola, The World's Largest Bony Fish

Ian Somerhalder

Actor Known for "The Vampire Dairies;" Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Ian Somerhalder Shares His Love For Animals | PeopleTV

Anthony Carrino

Designer; Host of HGTV's "Kitchen Cousins"

Alison Victoria

Interior Designer; Host of HGTV's "Kitchen Crashers"

Q&A with Alison Victoria of HGTV's Windy City Rehab

Dave Salmoni

Animal Planet Television Personality & Large Predator Expert

Louie Psihoyos

Photographer & Documentary Film Director; Known for the Academy Award-winning documentary "The Cove"

Daryl Hannah

Film Actress; Known for the "Kill Bill" Series and "Splash"

Terri Irwin

Naturalist, Author & Owner of Australia Zoo; Former Star of "The Crocodile Hunter"

Tom Colicchio

Chef & Owner of Crafted Hospitality

David Chang, Gabrielle Hamilton & Tom Colicchio on Their Earliest ...

Danni Washington

TV Host & Ocean Explorer

Program: Xploration Nature Knows Best

Tan France

Fashion Designer & TV Personality, Known for Netflix's "Queer Eye"

Antoni Porowski

Chef, Model & TV Personality, Known for Netflix's "Queer Eye"

Jonathan Van Ness

Hair & Beauty Expert; Author; Television Personality; Known for Netflix's "Queer Eye"

Jonathan Van Ness of ‘Queer Eye’ Comes Out

Justin Fichelson

Luxury Real Estate Advisor & TV Personality; Known for Bravo's "Million Dollar Listing San Francisco"

Selenis Leyva

Cuban-American Actress Known for Her Role as Gloria in "Orange is the New Black"

Tia Torres

Pitbull Advocate & Rescuer Known for Animal Planet's "Pit Bulls & Parolees"

Jeremy Wade

Writer and TV Presenter

Tensie Whelan

Director of NYU's Center for Sustainable Business; Former President of the Rainforest Alliance

Tensie Whelan Keynote Address: 12th Annual NYU Stern-Citi ...

Simon Lovell

English Comedy Magician, Card Shark Actor and Con Man

Urban Tarzan (John Brennan)

Bronx native — a wild animal relocation specialist who legally changed his name to the bizarre moniker — stars in Spike TV’s newest series, “Urban Tarzan,”

Donald Shultz

Donald Schultz is a South African herpetologist who travels the world getting samples from dangerous species. Schultz is on a show on Animal Planet called Wild Recon.

Amber Jenkins

Applied Science Engineer, NASA’s Jet Propulsion Laboratory; Editor, NASA Climate Change Website