-
100
Obelisk used by early Egyptians
3000 BCE obelisk used the sun and the shadow it cast to tell time. -
300
Babylonians use sundial
A 12-hour clock using the sun and the shadow it casts on the gnomon to tell time -
350
Water Clock used by Early Greeks and Egyptians
Also called a clepsydra that used the flow of water to tell time -
400
Ancient Chinese use the burning of ropes to tell time
lighting flames on ropes and marking candle wax to track the passing of time -
Oct 26, 1100
Hourglass used by Europeans
first tool to tell time not dependent on the sun -
Oct 26, 1300
Mechanical Clocks used to tell time
First appreared in Europe -
Oct 26, 1400
Watches used to tell Time
Analog clocks that people could wear or carry first created -
Jan 1, 1500
Copernicus argues that the earth rotates in 24 hour periods
The earth revolves around the sun annually, creating seasons. The earth rotates in 24 hour periods, creating day and night.