I haven't seen a history text book in many years, so my information goes only as far as I can remember.
A background check in Washington state typically goes back seven years for most criminal history information.
5,000
I have no clue
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.
14000 ago
That is unknown because it is too far back in history.
Make that several thousand years!
Unknown. History doesn't record that far back.