Karl is an Abyssinian ground hornbill with a special challenge. His
lower bill had broken off and made eating difficult. Karl did a great
job of adapting and finding new ways to eat, but he wasn't getting all
the food he needed. His zookeepers at the National Zoo and friends at
the Smithsonian Institute wanted to help. Could an old bird skeleton and
a 3-D printer give Karl a new beak? Karl's new adventure was about to
begin!