There is a view that science can ultimately explain everything, can answer every legitimate question. It is called scientism. Interestingly, most scientists consider scientism a pretty dubious doctrine. Many accept there are questions that science has not, and perhaps cannot, answer.

Take moral questions, for example. Is killing always wrong? Is it morally acceptable to design a baby? Science can make new technologies possible, including weapons of mass destruction and genetic engineering. But most scientists agree that science cannot tell us whether it is ever morally permissible to use such technologies. It seems, as the philosopher David Hume famously noted, that science ultimately reveals only what is the case; it cannot tell us what we morally ought or ought not to do.