There is no reason to think aliens even exist, let alone come here in flying saucers. People see a blob of light in the sky that is really an aircraft or balloon, something like that, but in their mind they pretend they are watching an alien craft. The reason they glow? The objects that aren't reflecting light, don't get noticed and reported as flying saucers!
That's a really good question. From everything I have ever learned about UFOs they can hover completely silent and without lights. We use lights to see and/or be seen. I doubt alien crafts rely on external lights to see where they are going, their navigation equipment would be far more advanced than that. So the only other logical reason would be to be seen. We can only assume they want us to know of their presence. We can only guess at the reason for this.
flying saucer = fliegende Untertasse
"Vliegende schotel" is a Dutch equivalent of "flying saucer."
Summer of the Flying Saucer was created in 2008.
Flying Saucer Attack ended in 2000.
The Flying Saucer Mystery was created in 1980.
Flying Saucer Attack was created in 1992.
Flying Saucer Rock'n'Roll was created in 1997.
Flying Saucer Blues was created in 1999-11.
Flying Saucer Daffy was created on 1958-10-09.
Flying Saucer Working Party was created in 1950.
There is no flying saucer cheat for GTA IV.
Chorus - Flying Saucer Attack album - was created in 1996.