About 10,000 years ago, this huge inland lake, the remnants of glaciers, began to drain in present-day Manitoba.
ɐbˌaʊt tˈɛn,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ jˈɪɹz ɐɡˈoʊ, ðɪs hjˈuːdʒ ˈɪnlənd lˈeɪk, ðə ɹˈɛmnənts ʌv ɡlˈeɪʃɚz, bɪɡˈæn tə dɹˈeɪn ɪn pɹˈɛzəntdˈeɪ mˌænɪtˈoʊbə.