Religion doesn't fit within the realm of science, which after years or even months, is made outdated by new research. Religions seek to answer the philosophical, spiritual and the social, which are something innately human. With exception to the hyper-rare cases where it is absent, morality is also a human condition. Every human being has some sort of code to dictate whether something is morally right or wrong, and when people inevitably ask why, they either conclude that they hold the key to their morality, or, as biblical scholars state, that because of the inherent evils of mankind can't be akin with good, there must be a source to all good. People who conclude this do not necessarily identify this good as God, but it can be often the case.
