Creationists have often pointed out that evolution is unscientific because it can never be proved by science to be true. It is not happening at present and without a time machine, they can never be sure that it happened in the past.

Judging from the number of published books and articles on the subject, there is a lot going on in the field of evolutionary cosmogony as astronomers and cosmological physicists are trying to learn how the universe originated and its various components evolved, including all the millions of galaxies, stars, planets, and other objects in the vast cosmos.