Highly recommend the documentary Blue Planet 2. Water covers about 70% of the surface of this planet yet we know nothing about life beneath the oceans. The documentary Blue Planet is a triumph on many grounds. The documentary opens with the most benevolent organisms on this planet…Ah, Dolphins. The documentary is both a visual and informative spectacle spread out over the next 1 hour 34 minutes, encompassing underwater ecosystem. Breathtaking visuals, it’s very informative and intellectually stimulating.