The Pentagon’s classified "brief" on the existence of alien life has been revealed, and it is only 17 pages long.

For those who have long-awaited the answers that could be contained in this government report, the classified version is unlikely to satisfy their thirst for knowledge.

A nine-page preliminary US government report was released last month with the classified version said to only have an additional eight pages, according to author and podcaster John Greenewald.

Just a matter of days after the preliminary report was released late last month, US officials declined to comment on the length of the classified version but revealed it was "substantively consistent" and held the same conclusions as the publicly accessible document.

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