Archimedes corrected Aristotle's theory that bodies move towards their natural resting places; metal boats can float if they displace enough water; floating depends in Archimedes' scheme on the mass and volume of the object, not, as Aristotle thought, its elementary composition.
ˌɑːɹkɪmˈiːdiːz kɚɹˈɛktᵻd ˈæɹɪstˌɑːɾəlz θˈiəɹi ðæt bˈɑːdiz mˈuːv təwˈɔːɹdz ðɛɹ nˈætʃɚɹəl ɹˈɛstɪŋ plˈeɪsᵻz; mˈɛɾəl bˈoʊts kæn flˈoʊt ɪf ðeɪ dɪsplˈeɪs ɪnˈʌf wˈɔːɾɚ; flˈoʊɾɪŋ dᵻpˈɛndz ɪn ˌɑːɹkɪmˈiːdiːz skˈiːm ɔnðə mˈæs ænd vˈɑːljuːm ʌvðɪ ˈɑːbdʒɛkt, nˈɑːt, æz ˈæɹɪstˌɑːɾəl θˈɔːt, ɪts ˌɛlɪmˈɛntɚɹi kˌɑːmpəzˈɪʃən.