Then they realized that horses left horseshoes, nails, and piles of manure in the roads
Soon, the marvelous elixir of gasoline was concocted, Firestone discovered the method of vulcanizing rubber.... and the birth of the internal combustion engine happened, roughly about the same time, and Voila! Some smart guy put it all together, and the human race began rolling around with engines powering wagons and the horse became obsolete
The automobile was on it's way to changing human culture, art, and transportation.
For everyone that earlier read 13th anniversary... well, I'm a car guy, not a math guy