You can find comparison of Vepulla rock from deferent eras with diferent life spans and time taken to climb the rock is different in Vepullapabbatasutta.
The Tivaras - life span of 40000 years
Climbed the rock in 4 days and descend it in 4 days.
The Rohitassaes - life span of 30000 years. climbed the rock in 3 days and descended it in 3 days.
The Suppiyas - life span of 20000 years.Climbed the Supassa rock in 2 days and descended it in 2 days.
The life span of the Magadhians is very short ~100 years
Climb the Vepulla rock in a moment and descend it in a moment.
I. Increased body size makes them slow, if so why?
II. Height of the Vepulla peak decreased with the time, if so how?
What are the possible explainations to this example which was used to explain impermanence of the world?