(CNN) PSA for all the Area 51 stormers, chemtrail believers and climate change deniers: Edward Snowden has searched the depths of the US intelligence networks and can report the conspiracy theories are not true.

As a former employee of the CIA and contractor for the National Security Agency, Snowden had access to some of the nation's most closely held secrets.

And, like any curious mind with access to the CIA's version of Google might do, he went in search of answers to some of society's most pressing questions.

As it turns out, the US government is not aware of any intelligent, extraterrestrial life, he says.

"For the record, as far as I could tell, aliens have never contacted Earth, or at least they haven't contacted US intelligence," Snowden writes in his recent memoir, " Permanent Record ."

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