Wednesday, October 6, 2010

How old is the Earth?






Earth is millions and millions of years old. In fact, our planet is four-thousand-six-hundred-million years old. When the Earth's age is written as a number, it looks like this: 4 600 000 000. It's hard for us to imagine anything so old!




Source: Amazing Questions and Answers(2002), Parragon Book.




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