I personally believe that one should ask questions. Arjuna did and that's how we got Bhagavad Gita. Your question is very valid and deserves an answer.
I will quote two separate sources and try to summarize in the simplest way possible where to look for God's lab and his thesis :)
Even before nothing existed, there was the supreme soul ('God' as most
of us refer him). At some point, he manifested himself into basic
elements and properties. And with his (creative) power those elements made up
everything that our senses can perceive and beyond.
However different things look, everything material and non-material
has originated from the same supreme soul and some day will merge back
into the same.
Coal, diamond and food we eat are all forms of carbon. This simple analogy builds the premise to understand that everything you can perceive from Stars to Flowers is some form of the supreme soul. The soul of everything (Brahman, as the scriptures call it.)
Where is his laboratory?
13.5 billion light years of observable universe is one setup in his laboratory. There can be infinite more setups which we cannot perceive. (Look up 'Multiverse')
Where is his thesis?
The supreme soul himself is the scientist, the experiment, the outcomes and the thesis.