Evolution is taught as fact, but it is not.  The fossil record of the first third of the Cambrian Period wherein 99% of the ancestors of life forms, including mammals, birds, fish, reptiles, amphibians, and so forth, all appear, is a problem for evolutionary theory.  99% of life forms appearing in 10 million years, less than 3% of the 3.6 billion years life has existed on earth, cannot be explained by evolution.  Nor can evolution explain how DNA, which is essentially digital information, can become more complex over time.  All known increases in digital information and complexity, we must involve intelligence, mind, a creator, or in the case of the existence and complexity of life, apparently God.