Evolution

I don't get the theory of evolution. I mean evoluntionists think the Earth was formed when two planets slammed into each other and everything basically evolved from some kind of sea animal! I just don't get it. Brian and I watched a show about it a couple of nights ago on Discovery Channel. I have to admit we did not watch the entire show. It was just too much for me to even wrap my brain around. I just don't get how scientists try to explain everything and just not acknowledge God's hand in everything.