The ocean covers more than 70% of the Earth's surface and is a vital part of our planet's ecosystem. Despite its importance, much of the ocean remains unexplored and undiscovered. In this article, we'll explore the current state of ocean exploration and answer the question: How much of the ocean has been explored?

To date, it's estimated that less than 20% of the ocean has been explored. This is due to several factors, including the vastness of the ocean, the depth and pressure of the water, and the high cost of ocean exploration.