How much do you love animals? Maybe not as much as photographer Joel Sartore. He is traveling the world to take pictures of as many animals as he can find, which allows people to focus on the beauty and uniqueness of each animal.

Sartore is working to take photos of all 20,000 different types of animals living in the world's zoos, aquariums（水族馆）and wildlife shelters. And he's already taken nearly 15,000! He hopes his photos will raise awareness of these planet's most endangered creatures, and that he can document them before they're gone. "My job is to tell their stories and hope that the world cares in time," he told The Weather Channel in 2022.

Sartore calls his project the Photo Ark, like the story of Noah's Ark, in which a large boat is built to save every type of animal in the world from a flood. He founded the Photo Ark in 2006 in his hometown of Lincoln, Nebraska.

He doesn't just take his animal photos in the usual zoo environment, however — he puts each animal on a black or white background with studio lights. This helps him photograph their true colors, and lets people see a little mouse as clearly as a big elephant — and look each animal right in the eye. "When people connect to animals through eye contact, we've got a real chance at changing human behavior," Sartore says.

The response has indeed been huge. Sartore has more than 1.6 million followers online and a best-selling series of Photo Ark books. He asks people to buy his books and photos, give money to the Photo Ark, and support zoos, aquariums and wildlife shelters near where they live.