Nashville Bomber Sent Conspiracies Notes & Videos to Pals Before Explosion

The Nashville bomber, Anthony Warner, was just as out there as people might've suspected -- because authorities now say he sent letters full of kooky ideas days before detonating.

Warner sent a number of letters and videos to friends and acquaintances all over the country on Dec. 23 -- two days before his RV exploded in downtown -- with bizarre writings about everything from aliens to lizard people, 9/11 and the moon landing and everything in between ... this according to CBS News, citing law enforcement officials.

Apparently, Warner sent several packages without return addresses -- which contained upwards of nine pages of typed-out text, plus a couple of thumb drives with videos.

One such letter begins, "Hey Dude, You will never believe what I found in the park." Warner continues, "The knowledge I have gained is immeasurable. I now understand everything, and I mean everything from who/what we really are, to what the known universe really is."

He goes on to say there are too many anomalies to count as it relates to 9/11 and the moon landing, adding a theory about the Earth being under active attack by aliens since at least 2011 ... something he claims the government is covering up.

And, then ... there's the lizard people, whom Warner supposedly thinks walk among us -- and control things. He reportedly writes, "They put a switch into the human brain so they could walk among us and appear human." Warner also signed some of these letters as "Julio."

Friends of his have said that's a name he'd gone by, but neighbors also pointed out that his dog was named Julio. His dog may have died in the explosion, because animal remains were also recovered at the bomb site ... in addition to tissues connected to Warner.