ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt ðə mjuːzˈiəm jˈɛt ɐɡˈɛn tʃˈeɪndʒd ɪts nˈeɪm tə ðɪ ˈiːkoʊ tˈɛɹiəm, ænd bɪɡˈæn æn dˈɑːlɚɹ ˈeɪtiːn mˈɪliən ɛkspˈænʃən ænd ɹˌɛnəvˈeɪʃən pɹˈɑːdʒɛkt wˌɪtʃ wʌz kəmplˈiːɾᵻd ɪn tˈuː θˈaʊzənd.
In 1998 the museum yet again changed its name to the EcoTarium, and began an $18 million expansion and renovation project which was completed in 2000.