Cheeseburgers

What could be simpler and more fundamental than the humble and beloved cheeseburger? Though there are hundreds (thousands? MILLIONS?) of burger versions in America and lands beyond, certain constants of composition, chemistry, and thermodynamics hold true no matter how you like your meat. Mastering the arts of grinding, salting, and smashing can give you next-level game on the grill. And incidentally, wouldn't it be fun to fire a few patties from a catapult? For science, and stuff.