Bertie Gregory, a National Geographic cinematographer, catches emperor penguins jumping off a 50-foot Antarctic glacier in ...

Roger Hughes has never seen emperor penguins in the wild ... He wondered: Maybe those bubbles help penguins swim faster. Over beer in a pub, Hughes bounced his hypothesis off his friend John ...

On Earth Day, the Secrets of the Penguins will ... of hundreds of emperor penguin chicks leaping from a 50-foot cliff into the icy ocean below for their first big swim. The footage has over ...