For National Geographic’s Photo Ark project, photographer Joel Sartore is documenting all species living in the world’s zoos, aquariums, and wildlife sanctuaries. There’s no denying how connected we all are.”Credit: Joel Sartore/National Geographic Photo Ark. Credit: Joel Sartore/National Geographic Photo Ark. Credit: Joel Sartore/National Geographic Photo Ark. Credit: Joel Sartore/National Geographic Photo Ark.