Are you aware that the overwhelming majority of Christians are taught to not take the Bible literally? Seriously from day one the Roman Catholic Church has held that position because that’s the exact same position the majority of rabbis at the time held about the Hebrew texts. Christianity could easily account for other life but most of Islam takes the Quran literally as Muhammed is supposed to have “fixed the mistakes” of the older texts. Simply put The Vatican wouldn’t need to do much to account for aliens.