It is a widely accepted theory that the universe started from a cosmic singularity and eventually through many years and processes gave us what we have today. But here's one question I ponder: how did the singularity get there in the first place? We know what the singularity caused, but what caused the singularity? Can something come from essentially nothing? I have been doing much reading lately, but am no expert on cosmology or physics. I am just curious about which physics or mathematical premise can explain this?? Thanks.