Sure carbon dating isn't perfect, nor can it be used for dates older then around 2 million years but there's other forms of dating. Like lakebed sediment dating or tree-ring dating.
http://en.wikipedia.org/wiki/Varve
http://en.wikipedia.org/wiki/Dendrochronology
There's overwhelming evidence for the age of fossils so to deny the age and dating of fossil records is to misunderstand geology.
>>30
There's a simpler way to check the existence of God. Asking him comes to mind and I can verify it worked for me. However it's a personal experience and few scientists ascribe the validity to the experiment.