There isn't any scientific explanation as to how they could fly. But reindeer must fly because they pull Santa's sleigh through the air. Furthermore, there is proof that Santa's reindeer live at the North Pole. The proof is that they aren't found anywhere else. Since they must live somewhere, they must live at the North Pole.
Evolutionists believe that animals change from one species to another.
Nobody has every seen it happen. After 130 years of searching the fossil record, there is no fossil evidence to indicate that it has happened in the past. But, as you will soon see in Gould's explanation, the lack of transitional fossils is proof that these fossils must exist. It is the North Pole Reindeer Proof. So, the comparison of evolution with Santa is much better than the comparison of evolution with gravity.