When you die and also when you go to prison. Pretty sure
First, take the year that is most recent which in our case is 1973 and then subtract from that 1961 to get 12 years old. Hope this helps!
to a certain extent. the rovers are meant to be stable in the conditions of cars along with it's gravity levels. these factors can fluctuate depending on the planet. other factors, such as wheel grip along with the inside work (wires and stuff) do not change too much.
