A Humboldt penguin chick stares at other marine animals in the hallway on the way to a wellness check at Lotte World Aquarium in southeastern Seoul. Visitors take pictures of the Humboldt penguin chick with aquarium staff on the way to a checkup. A member of the aquarium staff weighs the chick, and a veterinarian performs a physical examination. (Photos: Yonhap) By Yoon Chae-won　(choenayoon@heraldcorp.com)