From a turtle poking out of its egg to sloth sibs cuddling, this adorable collection highlights more than 150 youngsters across the animal kingdom.

It's the latest in renowned photographer Joel Sartore's National Geographic Photo Ark series.

Fall in love with rambunctious cougar kittens and playful coyote pups, fluffy pandas and curious chimps, as you explore more than 120 photographs of the youngest animals in the remarkable Photo Ark. These incredible portraits capture the curiosity of an eight-week-old white Bengal tiger cub, peer inside the egg of a yet-to-be-born eyelash frog, reveal the watchful gaze of a five-day-old white-tailed deer fawn, and more. Along the way, you'll learn fascinating facts about parenting practices, family relationships, and complex behaviors that characterize various species from birth to fledging.

Begun in 2005 with the goal of photographing every animal species in human care, Joel Sartore's National Geographic Photo Ark now numbers more than 15,000 animals. This new book in the popular Photo Ark series is perfect for everyone in the family-and for all those who share in the joy and wonder of the animal kingdom.