Have you any proof of that?
There are thousands of reports from pilots, Naval Captains, Astronauts and various other people.
Have you proof they are all bogus?
I've followed a few and those were not disproved. What do you mean by scientific by the way?
How would you prove observation and photographic evidence other than by observation and photographic evidence?
The standard of proof is on people who claim they are alien spacecraft. There is no credible evidence that supports that claim.
The pilots thing is a red herring. Pilots are trained to fly planes and military pilots are also trained to shoot or bomb things. They are no better eyewitnesses than anyone else.
Another telling thing is that with 3 billion smartphones in the world with increasingly better cameras, there are no decent photos.
And most of the stuff that was put about in the fifties and sixties is clearly influenced by the technology of the time and popular ideas about the future. Whereas twenty-first century humans are using MRI scanners and mapping genomes and gene splicing, the ‘technically-advanced’ aliens of the mid-twentieth century we’re sticking physical probes up hillbillies arses and carrying out physical autopsies.
Any rational view of the likelihood of an alien civilisation being able to travel light years on the off-chance of catching humanity in a narrow evolutionary window and just fucking around in the atmosphere a few times then disappearing again shows it up as ridiculous bollocks.
As for alien civilisations - I don’t even know where to start. The most obvious example cited, the pyramids, are the most primitive way to build a tall building.
