It’s no wonder deep-sea creatures are so strange. They survive against the odds in one of the most extreme environments on ...

But that doesn't stop lots of people and animals living in or near the Arctic ... and includes the deepest water, called the Mariana Trench. The Arctic Ocean is the smallest and one of the coldest ...

Conservation – protecting a natural environment, often to make sure species of animals or plants are not harmed. Coral reef – one of the most important ecosystems in the world. A large ...