At school, we learn that there are four oceans – the Atlantic, Indian, Pacific and Arctic Oceans. The National Geographic Society now says there are five. The fifth one is the "Southern Ocean". This is around Antarctica. National Geographic said it is important for children to learn that the Southern Ocean is "a fifth ocean".

Children will learn about climate change when they study the Southern Ocean. National Geographic said students should know how important it is. It said the Southern Ocean has "unique and fragile marine ecosystems" full of wonderful ocean life like whales, penguins and seals.