And as they kept exploring the universe, they consistently failed to find God. To quote Tim Minchin, throughout history, every mystery ever solved has turned out to be Not Magic The gaps in which God could be hiding are ever-shrinking. Or, as Nietzsche put it: "God is dead! God stays dead! And we have killed him!"
Of course, this wonderful, complex, grand, whimsical, fascinating universe is the best proof that, whatever its source may be, it certainly is not the work of the narrow-minded, stuck-up, egotistic brute, whose primary way of dealing with problems is "Smite Everything!" with a convulted way to get excepted hastily added, you - and no scientist ever - worship.
"I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forgo their use and by some other means to give us knowledge which we can attain by them."
- Galileo Galilei, Letter to the Grand Duchess Christina (1615)