Astronauts bring back rocks. Scientists study tiny rocks called zircon. The moon is older than we thought. It is over 4 billion years old. A long time ago, something big hit Earth. This made the moon. Scientists use a special way to find the rocks' age. Knowing the moon's age helps us understand Earth better. It is important to know the moon's age.

The moon helps Earth stay steady. It also affects ocean weather. People like the moon and want to explore space.

Some difficult words are: method (how we do something), age (how old something is), affect (to change something).

You can watch the original video in the Level 3 section.