In PEOPLE's sneak peek at the three-part show, premiering April 20 on National Geographic, a mother rockhopper penguin faces a giant beast to ensure the safety of her offspring. The clip begins ...

In the finals, he beat out Nio, a southern rockhopper penguin at the Indianapolis Zoo ... At about six weeks old, he did not want to eat, but after a blood donation from his dad, he started ...

In PEOPLE's sneak peek at the three-part show, premiering April 20 on National Geographic, a mother rockhopper penguin faces a giant beast to ensure the safety of her offspring. The clip begins with ...