Until now, they cannot call the exact cause of the ice age: a change in currents, volcanoes, a decrease in magnetic tension at the poles. Despite the belief that woolly mammoths lived during the ice age. They could not survive even in today's climate of Northern Siberia. The map of Russia, drawn up at the beginning of 17 in the drawing of Tsarevich Fedor Godunov hangs in Old Ladoga. Real History Release 19.