Oh my gosh, you have NO idea how excited I got when I saw this thread with yesterday's timestamp. I created an account solely to say 'howdy' and apply. When otherwise not occupied sleeping or eating, I'm spending all my time worldbuilding for the MLP universe.
-How their logogram writing system evolved out of cutiemark pictures.
-How their cuteness--their big eyes, broad forehead, general “roundness” of features-- may have been an adaptation to play against parental instincts in other animals prior to ponies banding together into organized societies.
-How and why they domesticated the entire planet, to where not even season happen on their own.
Oh my gosh! I so want to be useful to the LoE crowd!