does this sound crazy or crazy smart?

From the S.E.T.I. experiments in the 1970s to advanced computer models there has been debate on how to travel far in space one could travel.  This is one of the most debated and discussed topics in all of science.  How would extraterrestrials space travel?  Would it involve some type of compound that doesn’t necessarily exist like a di-lithium crystal? (bonus points if you know where that reference is from).  Here is an introduction from some professors on their theories:

“There is another way, whether it’s wormholes, or warping space, there’s got to be a way to generate energy so that you can pull it out of the vacuum, and the fact that they’re [extraterrestrials] here shows us that they found a way.” (source)– Jack Kasher, Ph.D, Professor Emeritus of Physics, University of Nebraska.

“There is abundant evidence that we are being contacted, that civilizations have been monitoring us for a very long time.” (source) – Dr. Brian O’Leary, Former NASA Astronaut and Princeton Physics Professor

Do any of these actually sound like they could happen or is it too far fetched?

Let’s see which ways made it on this list in the video on page 2

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