There is more and more evidence for the Big Bang. Thing is, teh Big Bang Theory (while proably labeled in an unfortunate way) is making predictions about the universe and so far all those predictions we can actually test have been confirmed. latest evidence is that polarized light by gravity waves ting. not sure I understand that one yet. But I think the theory predicts gravity waves happening at or shortly after the big bang which causes light to polarize in a very specific way which we have now observed.