The history of clocks.

No one knows for sure when ticking time first started. It might have been as early as 4000 BC when ancient Egyptians were using sundials to tell time. Over the years, clocks have become more and more popular. Here are four interesting facts about clocks:

1- The first clock was made in China in the 6th century AD.
2- In the 16th century, clocks started being mass-produced.
3- In the 19th century, clocks started being powered by electricity.

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