Covering more than 70% of the planet's surface, oceans have earned Earth the nickname "the Blue Planet ... The color of the ocean varies between ocean ecosystems. The open ocean is much darker ...

Show more While making Blue Planet II, we have explored parts of the ocean that nobody has been to before, encountered extraordinary animals and discovered new insights into how life thrives ...

This week on Blue Planet II we explored the open ocean; home to some of the biggest and most spectacular creatures on earth. How much do you know about the big blue?

Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet ... Pacific Ocean known as the Mariana Trench is the deepest spot on our planet ...

According to one school of thought, pollutants are diluted to safe levels by the time they reach the open ocean. But are the creatures that live here really protected from chemicals? In the past ...