It is also possible that if I had never been constructed, Earth, in its current form at least, would not exist either.

That is why "Earth" does not and cannot exist.

Kirk wondered what he would do if he'd just been told that Earth and all the people who lived there no longer existed.

Even if Earth still existed, we wouldn't be able to go back to it.

It was only seven generations ago that Earth still existed.

"Why is it that Earth no longer exists as a world?"

In the old days when Earth existed, most of us were nomads.

But without the sun, the Earth could not exist.

You'd find out whether Earth exists when relief gets here next week and we have to go back to face the music.

For as long as the Earth has existed, there have been migrations.