4,000 BCE ** Horses ** Equus caballus ** Central Asia
The DNA of domestic horses is very diverse. This suggests they may have been domesticated in more than one place, from several different wild horse populations.
3500 BCE ** Fixed wheels on carts, such as the chariot, invented – the first wheeled vehicles in history.
2000 BCE ** Horses are domesticated and used for transportation.
770 CE ** Iron horseshoes improve transportation by horse
1900 CD ** Gasoline-powered vehicles supplant horses for transporting goods and people
History of Horse websites