Firmament - We are trap underwater, deep, very deep down

The concept of the Firmament Solid dome dividing the primal waters comes from ancient beliefs about how the world was created. According to these beliefs, there was a time when everything was covered in water. Then, a solid dome called the Firmament was placed above the waters, separating them into two parts - one above and one below. This idea helped people explain why there is sky above us and why it doesn’t mix with the water on Earth.