Over half the planet lies in the ocean's depths, a vast and mysterious world unlike anything on land—and which remains largely unknown. Because we cannot protect what we do not know, as part of the #OceanDecade, scientists across the world are accelerating the discovery and understanding of our planet's final frontier, the deep sea. 👉 Read more in the new story of our "Ocean science in action" series, which highlights achievements and success stories from our network of endorsed Decade Actions at the mid-way point of the #OceanDecade 👉 oceandecade.org/news/ocean-science-in-action-understanding-the-unknown-why-scientists-are-exploring-the-deep-sea