Indeed there may be evidence however inconclusive at this time.
About 10 yrs ago tablets were discovered near the orignal site of the finding of the sumarian tablets.
Now, it is believed that the sumarian tablets are the first written glyphics of man. These newly discovered tablets are believed to pre-date sumarian tablets by 10,000 yrs.
I found the web site a few yrs ago discussing these tablets and posting pictures of them.Sad to say i no longer have this web addy.
Anyway..one of these tablets depicted a race of higher developed intelligence teaching the sumarians language and where they were from...etc.
The other tablet was a star chart of our solar system. This tablet depicted each planet in its correct position and all of each planets moons.
Included in this tablet were 2 other planets where we now have debri belts.
As for the authenticity of the tablets who can say?
But if they were authentic...then how did they get an exact map of the solar system in a time when man could not so much as cross a small sea?
In a time when we didn't even know what our own moon was..except that it might be a god?
Granted..we will most likely never find or obtain proof.Some things were never meant for us to understand or know.But we must remember that out there our physics,knowledge and reasoning have no bearing.
Anything is possible.Nothing is impossible until proven otherwise.