?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Preston+David&rft.aulast=Preston&rft.aufirst=David&rft.volume=1&rft.issn=2732-317X&rft.title=Sapiens+ubique+civis&rft.pages=11-28&rft.atitle=Empedocles'+big+break+%3A+pre-Socratic+cosmology+and+the+big+bounce&rft.date=2021&rft.genre=article