"The goose was completely unable to move." Officials make troubling discovery after pulling struggling goose from lake: 'Can ...

Nick, Luca, and Miro, three harbor seals involved in the German study, performed almost as well as humans at this task.

PEOPLE has an exclusive first look at "Ocean with David Attenborough," a new National Geographic documentary featuring the 99-year-old naturalist exploring how to protect the world's oceans.