Footage Bertie Gregory filmed for National Geographic's 'Secrets of the Penguins' captures baby penguins making daring leaps ...

National Geographic's upcoming docuseries, 'Secrets of the Penguins,' captured a shocking encounter between a mother ...

National Geographic celebrates Earth Month with some flightless, feathered friends in "Secrets of the Penguins," streaming ...

The penguin pack Gregory's team happened to be filming took a wrong turn due to melting sea ice and ended up on top of a 50-foot ice cliff staring at the ocean below. "Emperor penguin chicks take ...