I believe there is a relationship between things that had commonly been given divine attributes and things that have been discovered or solved through scientific means. Think about the Greek and Roman Gods for example. Everyone praised them as whole-heartedly as people today praise whichever religious icon they worship. So why is it that those believers (among many other religions as well) have almost all vanished? My theory is that it is mostly because of science. There is no need to offer sacrifices to Apollo so he can pull the sun over the land, no need to pray to Atlas to keep holding the world up, etc... because science has unveiled such mysteries.
So, to see it like I see it, picture a black mist covering the universe so nothing is visible. Call that mist religion or the divine. Now as time passes and our intelligence grows with our knowledge of the Earth, picture a hole in the mist that reveals Earth, but nothing else. The sun, stars, space and planets are still in the mist. Then as time passes, picture that hole in the mist expanding to at least the edges of our solar system, etc...
I see a correlation between the increase in scientific knowledge and the decrease in existences given divine attributes. Today, I would say the mist is gone from our universe entirely. Most of the universe, though obviously not nearly fully known to us, has now been secularized from the divine realm. Almost no matter what we discover, we are not expecting anything divine in nature, only that which can expand or be incorporated into science. The proverbial mist of religion has been pushed into another dimension or a place that 'can never be proven to not exist' and I believe this has been deliberately done by religious efforts over the past centuries because the leaders realized they could not win people over scientific fact.