natural cause

Go for God

Summary: If there is a phenomenon in this universe which forever defies natural description, and if science is also found to be incapable of providing a plausible account of it based on material processes alone, then there, and there only, God can show up by proving to be necessary.

Summary: Light exists in space and time, and it is not forcibly or artificially deprived of space and time. Still space and time are non-existent for light. What is the cause of it?