The World That Left

One morning, people noticed something in the sky that had never been seen before.
At first, they thought it was an island. It floated high above the clouds, supported by nothing. It had the shape of a gigantic creature, as if the skeleton of an unknown being had grown to the size of a ship and then broken free from the Earth.
But it was not dead.
Every day, it moved a little.
It did not fly, and it did not fall. It simply moved slowly, following a path that no one could see.
Strange white, rounded forms had grown upon its back. Some looked like houses, others like shells, and others like enormous eggs. Among them grew shapes resembling plants, although they had no leaves and no one had ever seen their roots.
People sent airplanes.
They sent drones.
They tried to get closer.
But the closer they came, the larger the floating world seemed.
One day, an airplane managed to fly above it.
The pilot sent a single message:
— It is not an island.
Then he went silent.
When the airplane returned, the pilot could not explain what he had seen.
He only said that there was a silence there unlike anything he had ever encountered. It was not the silence of an empty place. It was the silence of something alive.
Weeks later, people began to notice something even stranger.
The world was moving west.
Every day.
Always westward.
And no one knew why.
Some said it was a sign. Others believed it was a creature from another world. There were people who wanted to destroy it and others who wanted to capture it.
But no one considered the simplest possibility.
Perhaps it had not come to find us.
Perhaps it was leaving.
Perhaps, somewhere, millions of years before humans existed, that world had once been part of the Earth. Perhaps it had waited for so long that it no longer remembered where it had come from.
And now, for the first time, it remembered.
One morning, it disappeared.
The sky was empty.
Only a few strange clouds remained in its wake, drifting above the cities.
People stared at the sky for a long time.
And then they understood.
Perhaps they had never seen a world coming toward them.
Perhaps they had seen a world remembering the way home.