Knowledge of God only comes through personal revelation. I suppose that any physical evidence is in the eye of the beholder. For me, physical evidence pointing to intelligent design includes:
1. The incredible complexity of the human body. For example, the miraculous way in which a group of identical cells divide at conception and than in an instant, change. Some change into beating heart cells, others into nerve nad brain cells, others into bone, or liver or kidney or skin. This is just one of thousands of incredible things a person could think of. What about the eye, and sexual organs that produce only one of each gene from our set of 2 each and do it in a huge variety.
2. Our conscious thought and self awareness. Can it be developed in a lab? How could it be done? It is amazing that we can move our fingers or breath simply by thinking about it.
We believe in survival of the fitest. But why does nature care if anything struggles and survives at all?