Cities Beneath the sea
Coral polyps can truly be called the animals that helped make the world. For uncounted generations, trillions upon trillions of coral polyps have built structures called reefs, larger in scale than those of any other living beings, including humans. The stone-like material created by these tiny animals becomes limestone, a prized building material that was used to construct the Great Pyramids of Egypt. Huge deposits of limestone exist underground, beneath the ocean, in islands, and in mountains. Limestone has been used in the construction of countless churches, castles, train stations, and banks, and crushed limestone is a major ingredient of cement.
Cities Beneath the seaCoral polyps can truly be called the animals that helped make the world. For uncounted generations, trillions upon trillions of coral polyps have built structures called reefs, larger in scale than those of any other living beings, including humans. The stone-like material created by these tiny animals becomes limestone, a prized building material that was used to construct the Great Pyramids of Egypt. Huge deposits of limestone exist underground, beneath the ocean, in islands, and in mountains. Limestone has been used in the construction of countless churches, castles, train stations, and banks, and crushed limestone is a major ingredient of cement.
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