Blue Planet II

This is our Blue Planet: a beautiful blue marble suspended in a sea of stars. Unlike billions of other worlds in the Milky Way, 71 per cent of our Blue Planet is covered by ocean. It's home to the greatest diversity of life on Earth but is our least explored habitat; we've better maps of Mars than of the ocean floor. With so much more to discover, take a deep breath . . . and dive into a wondrous world beneath the waves. Explore coral reefs that shimmer in a kaleidoscope of colou