Complex sentence: It is highly likely that the Pythagoreans used the Platonic solids as dice; they referred to such dice as "the dice of the gods" and they sought to understand the universe through an understanding of geometry in polyhedra.
Split into simpler sentences: It is highly likely that the Pythagoreans used the Platonic solids as dice. They referred to such dice as "the dice of the gods" and they sought to understand the universe through an understanding of geometry in polyhedra.