SAN FRANCISCO (CBS SF) -- School may be out for the summer for children in San Francisco, but five penguin chicks at the San Francisco Zoo and Gardens just started their classes. The 2-month-old ...

She was totally into the excitement. Some animals are just ready to party no matter what. Even when they have no idea what everyone is so happy about, they're more than willing to join in on the fun.

Every now and then, zoos post the most precious videos showing how their young animals are doing. And while these videos in and of themselves are worth watching for how adorable they are, sometimes ...

Around 18 species of penguin can be found in living on Earth. Penguins can vary in size, with some weighing up to 88 pounds and standing over three feet tall, according to National Geographic.