When released, became the second highest grossing theatrical documentary (after Fahrenheit 9/11 (2004)).
It was noted that, by the time of the 2006 Academy Awards, this Best Documentary winner had out-grossed all 5 Best Picture nominees ($77 million vs. $75 million for Brokeback Mountain (2005)).
The Emperor Penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguins and the only one to breed during the winter in Antarctica.