As the armies of Genghis Khan swept his homeland, he was employed by the Nizari Ismaili state and made his most important contributions in science during this time when he was moving from one stronghold to another.
Ketika tentara Jenghis Khan menghancurkan tanah airnya, dia dipekerjakan oleh negara Nizari Ismaili dan memberikan kontribusi terpenting dalam ilmu pengetahuan selama masa ini ketika dia berpindah dari satu benteng ke benteng lainnya.