In a recent article J. J. Hall has argued that the mysterious πρηστῆρος αὐλός which figures in Anaximander's theory of the universe is the funnel-shaped body of a tornado or waterspout. In reviewing meteorological evidence he notes that lightning often accompanies such storms. Anaximander himself could have concluded that the funnel is actually full of fire and then could have drawn an analogy between fiery heavenly bodies seen through a hole in surrounding mist and internal fire seen through the open bottom of a cloud.

M. L. West has expressed doubt about this suggestion on the grounds that ‘a person in the uncomfortable situation of looking up such a funnel would not see fire.’ There are undoubtedly some difficulties in Hall's proposal, as he himself admits. But West's objection is oddly off the mark. What is initially at issue is what Anaximander believed to be true, not what is true.