General Facts
1. Earth’s Surface – Oceans cover about 71% of the Earth's surface.
2. Largest Ocean – The Pacific Ocean is the largest, covering more than 30% of the Earth’s surface.
3. Deepest Point – The Mariana Trench in the Pacific Ocean is the deepest point, reaching about 36,070 feet (10,994 meters) at Challenger Deep.
4. Water Volume – Oceans contain 97% of Earth’s water.
5. Saltiness – Ocean water has an average salinity of 3.5%, meaning every liter of seawater contains about 35 grams of salt.
Marine Life & Ecosystem
6. Biodiversity – More than 80% of the ocean is unexplored, and scientists estimate millions of undiscovered species.
7. Largest Animal – The blue whale is the largest animal on Earth, reaching up to 100 feet (30 meters) in length.
8. Bioluminescence – Many deep-sea creatures produce their own light, a phenomenon called bioluminescence.
9. Coral Reefs – Coral reefs, like the Great Barrier Reef, are among the most diverse ecosystems but are threatened by climate change.
Mysterious and Unique Phenomena
10. Ocean Currents – The Great Ocean Conveyor Belt (thermohaline circulation) regulates global climate by distributing heat.
11. Underwater Volcanoes – About 75% of Earth's volcanoes are underwater.
12. Underwater Lakes & Rivers – Some areas of the ocean have high salinity levels, creating underwater lakes and rivers.
14. Atlantic vs. Pacific – The Atlantic Ocean is saltier than the Pacific due to higher evaporation rates.
Human & Historical Connections
15. Oldest Ocean – The Pacific Ocean is the oldest, estimated to be around 750 million years old.
16. Lost Cities – Ancient underwater ruins, like Dwarka (India) and Yonaguni Monument (Japan), suggest submerged civilizations.
17. Titanic's Resting Place – The Titanic wreck lies about 12,500 feet (3,800 meters) deep in the North Atlantic Ocean.
18. Deepest Human Dive – The record for the deepest manned ocean dive is 10,927 meters (35,853 feet), achieved by Victor Vescovo in 2019.
19. Plastic Pollution – Over 8 million tons of plastic enter the ocean each year, threatening marine life.