- The area that is now the Mediterranean Sea was once dry, but about 5 million years ago the Atlantic Ocean poured through the Strait of Gibraltar at a rate 1000 times that of the Amazon, filling the Mediterranean Sea in about 2 years
2. Heracleion, an ancient Egyptian city that was swallowed by the Mediterranean Sea about 1,200 years ago, was discovered in 2000 and has been the site of an underwater excavation since then.
3. 10,000 shipping containers are lost at sea each year and 10% of those hold toxic chemicals which may leak into the ocean
4. “Sailing the Seven Seas” originally referred to the seven bodies of water Arabian traders crossed to reach China.
5. Sea monsters on medieval maps were originally used to indicate the unexplored territories.
6. 29,000 rubber ducks were lost at sea in 1992, and are still being found, revolutionizing mankind’s knowledge of ocean science
7. In the 16th and 17th centuries, two thirds of Denmark’s income used to come from charging people to enter or leave the Baltic sea, those that refused to pay were sunk
8. There is a massive load of 52 gallon drums containing mustard gas and nerve agents at the bottom of the seas near Ireland and England
9. Every year Finland gets about 7km2 bigger because it is rebounding from the weight of ice age glaciers and rising out of the sea.
10. Sea ice is drinkable because it has a tenth as much salt as sea water does. This is because ice will not incorporate sea salt into its crystal structure.
11. Aral Sea, once the fourth largest lake in the world, is now just 10% of its original size after Soviet engineers diverted water from its feeder rivers to cotton crops in the desert and is considered one of the worst environmental disasters in history.
12. Hot hydrothermal vents at the ocean Sea bed heat the water up to 400°C and the pressure of the water above stops it from boiling.
13. 10,000 years ago, every human’s eyes were brown until someone living by the Black Sea developed a genetic mutation turning brown eyes blue
14. Baltic sea doesn’t mix with the North Sea due to the difference of the density
15. In 1966, the US lost a hydrogen bomb in the Mediterranean Sea, and struggled to find it. Finally, a Spanish fisherman helped them find it, and asked for the $20 million finder’s reward that the US owed according to law. Air Force eventually settled out of court for an undisclosed sum.