Seperti disebutkan sebelumnya, Aristoteles sendiri menolak konsep tentang ruang hampa, dan ia hidup lebih dari 1.200 tahun kemudian!
This involves research into diseases which are common but for which there is no market for the pharmaceutical industry, in particular diseases affecting people who cannot pay for their treatment. This is particularly the case with tropical diseases and even malaria and tuberculosis.jw2019 jw2019