110,000 years ago they built underground cities as 'arks', just like today, for the SAME reason

There are many shorter and longer term cycles that the earth's weather goes through. These have all been documented using ice core and rock samples. This Zoroastrian 'myth' appears consistent with what we now know about solar weather, cosmic radiation induced weather, and gravitational force induced weather, including associated volcanic and seismic activity. Expect a repeat of the same suddenly onset of catastrophic cold weather that lead to the building of THESE underground cities, starting 2019.