I was thinking about responding to a long letter someone sent that "disproves" evolution based on the second law of thermodynamics. I've see this argument many times - it basically says the second law states entropy always increases. In other words order turns to disorder. In evolution we see order coming from disorder, so there is a contradition.
The creations don't understand the physics involved. There are many ways to debunk this - usually talking to an undergraduate who has had a good thermodynamics course is sufficient, but I'll put down a few notes.
The second law of thermodynamics only applies to thermodynamically closed systems - a system where heat can't enter or escape. But heat is constantly flowing to the Earth from the Sun (and a tiny bit from starlight and reflected light from the moon) and is constantly being radiated out. The way a physicist deals with this would be to consider the Earth part of a larger system that is approximately closed (you can define what you mean by approximately with good precision). In a system the entropy of one part of the system can decrease as long as it is balanced by an increase somewhere else. In the case of the Earth there is a lot of heat coming from the Sun (even though it is Winter ... brrr) and this is more than sufficient to balance out decreases elsewhere.
There is another finer point that the creationists get wrong - entropy is not the same thing as disorder. But this is a finer point and demands a deeper knowledge of physics. It turns out the first point dominates, so we'll go back to that.
I'll leave out the calculations, but you can work out the the sun supplies enough entropy increase to the earth in a very short amount of time to balance out the entropy decrease from evolving all of the biomass on earth. There is a lot of overkill in the system if you want to have life emerge through the universe. (fortunately!)