I haven't seen a history text book in many years, so my information goes only as far as I can remember.
I have no clue
5,000
That is unknown it is so far back in history.
Traces do not go back that far in history.
In 1892, John Froelich invented and built the first gasoline/petrol-powered tractor in Iowa. The history of the engines with in tractors go back as far as 1850.
A space probe or spacecraft goes into space and reports back information.
The history of human flight doesn't go very far back in time.
That is unknown because it is too far back in history.
Unknown. History doesn't record that far back.
14000 ago
Make that several thousand years!
History goes back only as far as a written record can be found for that area. For some parts of the world history goes back several thousands of years. That includes Egypt, China and perhaps Greece. For the Americas, history goes back to 1492 or later for most parts of America.