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When and how was the Earth formed?
What other things are like the Earth?
Is it true the Earth didn’t have oceans at the very beginning?
How come is the Earth called the Water Planet?
How was the Earth’s land made?
Is it true the continents are moving?
Is the Earth still active?
What’s the center of the Earth like?
Is the Earth moving really fast?
Why does the Earth’s temperature change?
Why doesn’t the Earth run out of water?
What will happen to the Earth at the very end?
Is it true people in ancient times didn’t know the Earth is round?
