Answer:
The Cold War.. Military alliances were formed as the West grouped together as NATO, and the East banded together as the Warsaw Pact. By 1951, Europe was divided into two power blocs, American-led and Soviet-led, each with atomic weapons. A cold war followed, spreading globally and leading to a nuclear standoff.
The federal government is responsible for this.
Existed during the last glacial maximum, approximately 14,000 years ago, when sea level was much lower and present-day Alaska and eastern Siberia were connected.
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.