Question

how our ancestors could measure the time give scientific reasons​

Answer 1

our ancestors built edifices that measured passing moments. These were famously called as Sundials. The sundials had points engraved in them which would calculate the day timings with the movement of sun and moon.

Answer 2

Answer:

Apart from the general ways of predicting time through repetitive events, our ancestors also built edifices that measured passing moments. These were famously called as Sundials. The sundials had points engraved in them which would calculate the day timings with the movement of sun and moon.