Why has the ocean not been fully explored?

The ocean is vast, covering about 71% of the Earth's surface. It is also very deep, with an average depth of about 3,700 meters (12,100 feet). This makes it difficult to explore, as humans can only withstand limited pressure and can only stay underwater for a short period of time.

Additionally, the ocean is constantly changing, with currents, tides, and waves. This makes it difficult to map and understand the ocean floor.

Here are some of the challenges of exploring the ocean:

* High pressure: The pressure at the bottom of the ocean is very high, which can crush submarines and other equipment.

* Lack of light: The sunlight does not penetrate very far into the ocean, which makes it difficult to see and explore.

* Cold temperatures: The ocean is very cold, which can make it difficult for humans to survive and for equipment to function properly.

* Strong currents: The currents in the ocean can be very strong, which can make it difficult to navigate and explore.

* Rough waves: The waves on the ocean can be very rough, which can make it difficult to launch and operate equipment.

Despite these challenges, humans have made significant progress in exploring the ocean. We have mapped much of the ocean floor and have discovered many amazing creatures and ecosystems. However, there is still much that we do not know about the ocean, and we continue to explore it every day.