I'm going to take it Jim Steele, you are an atheist.
As I said, in the Siberian explosion a hundred years ago, most people didn't exactly know what had happened there. The theories ranged from the absurd (a miniature black hole had suddenly opened) to some concrete theories (an object entered space and broke apart above Siberia, we just don't know). It was until almost 90 years later that science had not only the equipment but understanding to know what exactly happened over Siberia that day.
And then you got the Mary Celeste, to this day we still do not know what ever happened to their crew or what caused them to flee. We can only GUESS but we have no clue. Same with the lost colony at Roanoke. Something happened to both of these but we can't explain what exactly happened.
I know for a fact that we have not even uncovered much about what we know about space or even our own planet. We find new species of animals almost every year, we find occasionally, species that have died off that have survived.
