Buzz Aldrin explains his thoughts on how to communicate with aliens

Legendary NASA astronaut Buzz Aldrin recently talked about colonizing Mars and confirmed his belief in higher lifeforms.

Aldrin stopped by AOL Build last week to promote his new book and while taking questions he said he believes there are more intelligent beings in the universe.

In response to an audience member's question, Aldrin began discussing a science-fiction story he's working on that relates to Star Trek, saying he's "already about halfway there."

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He alluded to an alien civilization that sent humans "all of their smarts" 9,000 years ago, so that we could travel to where they are located in the universe.

When asked if this was science-fiction or his own beliefs, the Apollo 11 pilot called it "the most realistic science-fiction of the past, of the present and of the future that you will ever read."

Aldrin explained the "creatures" used zero-point energy, and then noted the Chinese are currently using high-frequency gravity waves that can "help you travel interstellar distances."

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"A much more high advanced civilization, and we will be there, will communicate by high-frequency gravity waves," he said.

The 86-year-old added that the only thing we may come across while colonizing Mars would be "maybe a defunct creepy crawler."

"I don't think there's a chance of finding anything still alive," he said.