Re: Scale
Factors limiting the size a living form can grow?
Certainly the gravity of a planet is one of the main factors. Calcium bones can only support so much weight. Perhaps a skeleton made of a stronger element might allow for larger forms (bones of iron?) Also the medium the creature lives in is a factory. A denser medium like water, or a Venus dense atmosphere could probably allow a larger form.
Would the amount of energy a planet or moon receives from its star impact the size of a form?