Science and belief go hand in hand..and both can be twisted. Christians believe God created everything. Science is pointing towards a creator more now than ever before.
Big bang theorists make up their own "sky fairies" and invent convenient "reasons" when explaining the big bang. Dark matter, dark enegy.....
As for the old, something from nothing question...from a christians point of view, God is and always has been. How can anyone say that??? Well...we know that nothing comes from nothing, right? We'd have to agree on that surely. So...lets go further....if nothing comes from nothing...then nothing woould be in existance now, yeah??
But things do exist, so something must have been in existance the whole time, otherwise...where did it all come from?
A christian would say, "From an intelligent creator".
A non beliver would have you believe that billions of years ago...absolutely nothing exploded for no apparent reason and created everything!