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