Exploring the Ocean Trenches of the Deep Sea
In Exploring the Ocean Trenches of the Deep Sea, narrator Sir David Attenborough highlights what explorers are learning about the seafloor. Watch deep sea divers in the Alvin submersible observing animals in the deep sea. This video is excerpted from BBC’s Blue Planet, a definitive documentary series diving into the mysterious depths of the sea to discover the natural history of the world’s oceans and the rarely seen marine life that reside there.
Lesson Express
Q: How far can the Alvin dive?
A: The Alvin can dive three miles below the surface.
Q: How deep is the Mariana Trench?
A: The Mariana Trench is seven miles below sea level.
Q: How much of the ocean floor has been explored by our submersibles?
A: Less than 1% of our ocean floor has been explored.
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