Sand covers the ground.

It looks simple.

It is soft.

But it hides things.

Old things stay under it.

People do not see them.

The sand keeps secrets.

Scientists dig in it.

They find objects.

The objects are from long ago.

Some are bones.

Some are tools.

People lived there before.

The sand buries them.

Time passes.

The secrets wait.

People ask, "What is down there?"

Sand hides stories.

It is a blanket for the past.