Can you claim land that is in the middle of nowhere?

Yes, certainly. In most US states (and a few other common-law countries) there is a process of "adverse possession" under which you may "squat" on a piece of privately owned land and wait out the statute of limitations for trespassing. If your occupancy meets the various criteria, the title to at least some of the parcel becomes yours automatically. That's the "common law", but many places have modified that with statutes.

Criteria vary and may include a requirement to actually notify the recorded title owners of your intentions, plus paying taxes, plus posting other forms, not to mention proving that your use was "open, continuous, exclusive, adverse and notorious."

In other words, if the owners of the land don't take steps to discover you're there (and you're not hiding and you're keeping others out), then they may lose the right to have you ejected.

Even in the middle of nowhere some one has claim to that land.

All land is owned. There isn't non owned land left.

There is no such thing as unowned land anymore.

NOPE local educated adults can explain why