Frank R Paul was an illustrator for the great pulp magazines of the 20s and 30s. His full color covers for Amazing Stories, Wonder Stories Science Fiction Magazine defined the look of what was at the time the brand new genre of science fiction Not only did he illustrate hundreds of covers, he did the cover of Marvel Comics #1. You may have heard of Marvel Comics, it went on to be quite successful.
He is the template for the look of science fiction and what all those who followed would draw from.
He invented the flyer saucer look and it is his illustration that people would describe during the UFO crazes that came afterwards.
“He was very innovative in the depiction of spaceships. Several of his illustrations were disc shaped and it has been speculated that he may have, accidentally, created the UFO craze when the first sighting of lights in the sky were described as disc shaped; this would have been the result of the psychological phenomenon known as mental set” -Armanda Simon