because people speak English
Sciences provide substances to what we don't know. Religion is the light in our darkest moment that Sciences cannot give the answer.
I personally believe, that religion based on faith, was primitive thinking of humankind. The human being couldn't explain or express scientific view about the universe, so the human being invent myths and superstitions, especially in Pharaohs. On the other hand in Greece, the philosopher there could express about the universe by scientific view.