Before revision: Nonliving things can also be characterized as coexisting where multiple kinds of such things exist in the same space, with the term having been used for things as disparate as different kinds of sand dunes on Mars, and black holes existing in the same region of space as dense nuclear star clusters.Graham, A.W.
After revision: Nonliving things can also be characterized as coexisting where multiple kinds of such things exist in the same space, with the term having been used for things as disparate as different kinds of dunes on Mars, and black holes existing in the same region of space as dense nuclear star clusters.Graham, A.W.