Answer:
Although it wasn't nearly as quick as trains when they were invented ,the pony express took a shorter time to mail letters than ships,which would often take many months,but anyways the main reason it was fast was because at a certain point the first mailman could stop to take a rest while another would step in and go further and this would go on,and since horses have been known to be fast it was rather easier to travel.
Explanation:
Although it wasn't nearly as quick as trains when they were invented ,the pony express took a shorter time to mail letters than ships,which would often take many months,but anyways the main reason it was fast was because at a certain point the first mailman could stop to take a rest while another would step in and go further and this would go on,and since horses have been known to be fast it was rather easier to travel.
