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  5. When I was a child, the Earth was said to be two billion...

When I was a child, the Earth was said to be two billion years old. Now scientists say it's four and a half billion. So that makes me two and a half billion.

Paul Erdos
Education, Children, Math
When I was a child, the Earth was said to be two billion years old. Now scientists say it's four and a half billion. So that makes me two and a half billion.