"Hooke was fascinated by muscles," Daniel put in, "and looked at them under his microscope, and labored at making artificial ones, so that he could fly. Those, I predict, could have been described by Mechanical Philosophy; after all, they were naught more than practical applications of the Rarefying Engine, and as such, subject to Boyle’s Law. With more time and better microscopes, Hooke might have found, within muscles, tiny mechanisms, likewise describable by mathematical laws, and thereby put to rest any supposed mysteries—"