kˈɛɹi dɪvˈɛləpt hɪz ɛkspˈændɪŋ ˈɜːθ mˈɑːdəl ˌɪndᵻpˈɛndəntli ʌvðə pɹˈaɪɚ wˈɜːk baɪ ˈɑːt kɹˈɪstɑːf hˈɪldʒənbˌɜːɡ, hˌuː pɹəpˈoʊzd ɐ sˈɪmɪlɚ mˈɑːdəl ɪn hɪz nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi θɹˈiː pˌʌblɪkˈeɪʃən "vˈɑːm wˈætʃsɛndən ˈɜːdbɔːl""ðɪ ɛkspˈændɪŋ ˈɜːθ".
Carey developed his expanding earth model independently of the prior work by Ott Christoph Hilgenberg, who proposed a similar model in his 1933 publication "Vom wachsenden Erdball" ("The Expanding Earth").