The oldest rock is on Earth.

It is very old.

Scientists find it in the ground.

They say it is 4 billion years old.

That is a long time.

The rock is older than people.

It is older than animals.

It comes from the past.

The Earth is different then.

It is hot and new.

Lava is everywhere.

The rock forms in that heat.

It cools and stays.

People see it today.

They ask, "Where did it come from?"

The oldest rock has answers.

It waits for us to learn.