dˈʊɹɹɪŋ ðə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi z, mˈækəl tˈɜːnd hɪz ɐtˈɛnʃən tə pɚpˈoːɹɾᵻd kɹˈiːtʃɚ, ðə mˈoʊkəlˈɛmbˈɛmb, wˌɪtʃ fˈɪɡjɚz sˈʌtʃ ɐz jˈʌŋ ˈɜːθ kɹiːˈeɪʃənˌɪsts klˈeɪm ɪz ɐ lˈɪvɪŋ dˈaɪnəsˌɔːɹ ɪnðə lˌɪkuːˈɑːlə swˈɑːmp ɹˈiːdʒən ʌvðə ɹᵻpˈʌblɪk ʌv kˈɑːŋɡoʊ.
During the 1980s, Mackal turned his attention to purported creature, the Mokele-mbembe, which figures such as Young Earth creationists claim is a living dinosaur in the Likouala swamp region of the Republic of Congo.