heaviest images - Joel Sartore

Two emperor penguins (Aptenodytes forsteri) at SeaWorld San Diego.

Two emperor penguins (Aptenodytes forsteri) at SeaWorld San Diego.

Two emperor penguins (Aptenodytes forsteri) at SeaWorld San Diego.

An emperor penguin (Aptenodytes forsteri) at SeaWorld San Diego.

An Emperor penguin (Aptenodytes forsteri) at SeaWorld San Diego.

Joel is a popular keynote speaker with conservation, corporate, and civic groups.

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Joel is the founder of the Photo Ark, a groundbreaking effort to document every species in captivity before it’s too late.

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National Geographic Photographer and Speaker