Doctor Who: The Pandorica Opens

There comes a point when scientific evidence and literary sources fail us in regards to knowing and understanding our ancestors. We can only assume what wacky and wild things went on back in the old days. So, I wonder, if the Doctor were to work with archaeologists and historians, would we know more about antiquity. I'm sure most of the time that the Doctor is saving this world and that, but if he is the master of time, would he have the ability to multi-task his way into doing both? 


How do we know that the ancient Celts and Romans weren't really involved with this? 


Dr. Who, can you spare some time?