Printing press that's the answer <span />
The Minie Ball was a type of muzzle-loading spin-stabilized rifled musket
22.26 yd2 that is really easy just use your brain
The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.
