# What is the mechanism of the universe? The universe consists of fermions and bosons interacting through gravity, electromagnetism, and the strong and weak nuclear forces. Humans can accurately model those interactions using General Relativity and the Standard Model of particle physics, and may be close to combining these two theories into a unified theory of the universe.
# What is the fate of the universe? There appears not to be enough mass in the universe to halt its (perhaps asymptotic) expansion into a vast emptiness growing steadily colder and darker.
The other approach
pin the question down. What god? What actions has it taken in the natural world? How does it influence us specifically? Then you can tackle that god with science by testing the purported effects it has