@Frank Apisa,
'Show me one' is shorthand for: 'if gods are actively messing around our universe, doing stuff in it, their presence should be (at least in theory) discernible to us'.
You basically retorted that they could be elsewhere than on earth. Far far away. I contend that in my definition of gods, they are not local. They are universal. This of course is only my assumption, part of my definition of what a god is supposed to be like.
For the sake of the argument, let's assume that gods can be local (eg forbidden to act on earth since Galileo). Then there are at least two possible meanings to what you're saying:
1)
given current scientific / astronomic knowledge, we don't know whether there are gods in this universe or not.
OR
2) science will
never ever be able to tell for sure whether there are gods or not in this universe.
I believe 1) is kind of trueish because we don't know if some race of extra-terrestrial beings do not deserve the name of 'gods' by somebody's standards... (not mine) but 2) is going too far.