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 (4.6 billion years) is written as a number, it looks like this: 4,600,000,000. It’s hard for us to imagine anything so old.
Has there always been life on the Earth?
Nothing at all lived on the Earth for the first billion (1,000 million) years of the planet’s existence. The conditions were not right for life. There were no plants or animals of any kind. Earth was a dangerous place of where life could not survive.
some of Earth’s oldest known rocks are found in Scotland. They are about 3.5 billion years old.