The first is the idea of evolution itself. This simply means that a species undergoes genetic change over time.
There are two different meanings of "evolution". They use the same word interchangeably but they are total opposites. Macro-evolution means change from a less complex kind of animal to a more complex or different kind of animal. Micro-evolution means variation within a species. The second one happens, the first does not. Notice how they use one to prove the other.
