UFO's/USO's - Unidentified Flying/Submerged Objects
Would I be correct in assuming that reports of UFO sightings only really started occuring, certainly with any frequency, after planes and helicopters were invented?
And that tales of abductions by aliens weren't nearly as common before the time of HG Wells (i.e. before anyone produced science fiction books and films featuring such tales)?
Is anyone aware of any survey done on this?