How much of the ocean floor has been mapped?
What are gabions?
What is a blue hole?
How deep is the deepest point in the sea?
Which ocean is bound by the North American, European and Asian continents?
Which is the world’s largest ocean basin?
Where is the world’s largest coral reef?
What can turtles mistake plastic bags for in the ocean?
UK mains electricity has 230 Volts. What is the highest voltage electric eels produce?
How much does an adult blue whale weigh?
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