jesus tomb?
Just wait until time travel starts, then we will have live reports of all historical events. No, we will not be able to change anything to do so ( even the slightest detail which could also cause the travellers to instantly none exist) would stop invention of time travel instantly as time line would change considerably over thousands of years. This suggestion is no more provable than any other regarding Jesus or anything else that may or may not of taken place 2000 years ago. Jonahs trip sound more like a submarine controlled by aliens than a whale but that is just my option and you all have yours as mine, all based on none facts.