All very well to be sure of whatever it is that’s under discussion but certainty doesn’t equate to truth.
One doesn’t rise in academia by questioning established ‘wisdom’. The correct books need to be read, digested and regurgitated. Areas of expertise are jealously guarded – witness the disgraceful treatment of Velikovsky after the publication of his remarkable book, ‘Worlds in Collision.’
The question of are we alone in the universe has been ridiculed for all my lifetime notwithstanding ample evidence to the contrary.
The blinkered view of the question of alien life and, more importantly, visitations here on Earth is neatly and spuriously dealt with by citing ‘Nothing can travel faster than light, the Universe is vast, therefore visits by aliens, if they exist, are impossible.’
I’d reverse that line of thought because our history is littered with alien visitation – therefore the idea that the speed of light cannot be broken becomes irrelevant.
Our national t.v. broadcaster recently presented a program about the Westall incident which happened on the 6th April, sixty years ago and involved a UFO descending close to a Primary school which was witnessed by many of the pupils and which was covered up.
That this happened isn’t in dispute.
Many years ago I witnessed a brightly lit UFO at close quarters. Remarkable to me but of little interest to others. I didn’t need a personal experience to bolster my understanding that alien life is a reality. As to what purpose brings them here – who knows, I don’t but it remains not only an area of abiding interest for me but widens the sometime/somewhat miserably deceitful and limited human experience to that of a vast, universal community.
Medieval art portrays UFO’s – here’s an example.

and the Westall incident,