Advancing Blank

It’s always hard to research
What no one’s aware exists.
Easier by far to search

For what everyone believes
Surely must exist, even
If it doesn’t, never did.

There’s always someone hunting
Down monsters, gods, and causes
For which there are good stories,

But who will do the searching
For what no one imagines?
That’s the job of the future,

That unknown source of new past,
To find the blanks in advance.