Have aliens ever visited the earth?

One thing all people stuck in a belief system have in common is an unwillingness to learn.

They will also lecture you as their belief gives them a false sense of superiority.

When you mention the impossibility for alien life to ever have visited the earth, they then go into a variation of their belief: “it’s not physical beings, but spirits”.

If you are a researcher talking to a believer, common ground cannot be found.

At least not for a long time.

Belief stands still. Research evolves.

In this video, at 27 minutes in, Cooper goes into such subject: