I am not completely shure but I would guess the Huns,
West
Black Death
north to south or south to north
north to south or south to north
nomads
the steppes
across Asia to Europe?
Asia & Europe
North and South America.
the himalayas
No, if you look at a world map you will see that Europe is WEST of Asia
The Aryan peoples stretched across Europe into western Asia. They had many religions.