The northernmost part of Asia, including much of Siberia, was largely inaccessible to the steppe nomads, owing to the dense forests, climate and tundra.
ðə nˈɔːɹðɚnmˌoʊst pˈɑːɹt ʌv ˈeɪʒə, ɪŋklˈuːdɪŋ mˈʌtʃ ʌv saɪbˈiəɹɪə, wʌz lˈɑːɹdʒli ɪnæksˈɛsəbəl tə ðə stˈɛp nˈoʊmædz, ˈoʊɪŋ tə ðə dˈɛns fˈɔːɹɪsts, klˈaɪmət ænd tˈʌndɹə.