First off I'm Agnostic.

But concerning what Navaros is saying, if there is a God and he is all powerful, one can not prove that the universe is billions of years old by extrapolating data gained now. Perhaps God made it look that way - we'll never know. Perhaps the laws of physics were altered to make it appear differently.

I only have a problem when people who try to square the circle with "proving" the bible using science. I'm happy that everything is as it says, and everything that appears different is merely because God made it that way - fair enough. But to state that the laws of physics are correct, and somehow a large flood can make rocks look 2 billion years older is going too far.

Macroevolution can be "proven" given enough time. That we've not monitored change for long enough does not disprove the theory.

Embryonic changes are the clearest view of evolution at work - humans have gills which they then loose for example; snakes have legs which again dissappear.

Of course, God could have decided that it was more "fun" this way, instead of mammals only developing with structures they'd need as adults.

What is a "natural process"?