10 Interesting Facts <br />About Earth's Oceans 1. The deepest part of the ocean is <br />called Challenger Deep, and it is <br />within the Mariana Trench. It is said to have a depth <br />of around 36,000 feet. 2. The Denmark Strait cataract, <br />Earth's highest underwater waterfall, can be found in <br />the Atlantic Ocean and has an 11,500-ft drop. 3. Point Nemo in the Pacific Ocean <br />is farthest from any land on Earth. 4. Over $60 billion in <br />sunken treasure is said to still be <br />in oceans around the world. 5. There are literal "dead zones" <br />that cannot sustain any sea life. 6. 70 percent of the oxygen <br />we breathe comes from<br />marine plants in the oceans. 7. The sea has a blue tint <br />because of orange and red <br />wavelengths from the sun. 8. Oceanographers have used <br />rubber ducks to get a better <br />understanding of water currents. 9. The ocean's floor contains cables from <br />communications companies that allow <br />the internet to travel across the globe. 10. Around 80 percent of <br />volcanic eruptions occur under water.
