There may be. odd out-of-place artifacts on Luna have long been a staple of Science Fiction. one old tv-movie had astronauts finding dinosaur fossils in rock-which postulates at some time in the prehistoric past the moon had both an atmosphere and life. oTther more sinister objects may have been sighted and/or recovered. the Lem had a cargo bay in the upper stage, the moon rover (vehicle) was abandoned, but other stuff couold have been taken home as in geological field trips!
according to some people, YES.
There is no way to tell where the first UFO was seen. Sightings seem to go back to when mankind drug his knuckles and lived in caves. But it seems that we have been 'visited' almost as long as we have been.
Not a single. Not proved presence of UFO
So many that the town of St. Paul, Alberta has built a UFO landing site.
Everywhere around the world.seen one my self climbing my fence
The UFO was seen in 14 county regoin along texas coast
UFO sightings predate recorded history.
UFO's can be seen virtually anywhere on earth.
It is a new moon.
On average there are over 600 reported sightings of UFOs annually.
The first actual UFO sighting was in 1500 B.C.!
Not that I know of.They went to the moon to experiment, and also to be the first country (USA) on the moon. :D