I have recently taken another look and realized that my previous theory of unicorn magic moving in circles was likely false. While the unicorns horn may have supported such a theory (Due to the spiral patterns on each one) the magic itself does not. A while back I was watching Twilight cast a spell, and thought that the magic was moving in circles, but closer observation shows it to be waves instead.
Unicorn magic does appear to move in a circular motion occasionally, but nowhere near often
Earth pony magic is interesting due to it's nature. Unicorns can use magic through their horns to directly affect objects, creatures, and the environment around them, while Pegasi use their magic to control the weather (And theoretically to allow or help flight..).
My theory for Earth ponies magic, is that while mostly internalized, it can possibly be externalized to a small extent. I believe that the magic in earth ponies flows in their bodies, stimulating muscle growth. This is what allows
Starting things off with a theory about my favorite species.
Alright, I'm going to assume everypony knows that Pegasi can fly. But why? Birds have hollow bones to make themselves lighter, without this they would likely be unable to take to the air. Ponies not only (By assumption) have hollow bones, but are also generally larger and heavier creatures. Add in the fact that the pegasus pony's wingspan does not seem large enough to accommodate for the size and weight of the pony in question, and
