Teng Mu was a Chinese scholar of the Sung Dynasty who adopted a position similar to that of Lucretius and other proponents of atomism with respect to extraterrestrial worlds. He wrote:
Empty space is like a kingdom, and earth and sky are no more than a single individual person in that kingdom. Upon one tree are many fruits, and in one kingdom there are many people. How unreasonable it would be to suppose that, besides the earth and the sky which we can see, there are no other skies and no other earths.