+A sundial is an ancient [Time](/wiki/Time)keeping instrument that uses the position of the sun to indicate the time of day. Its design typically involves a gnomon, which casts a [Shadow](/wiki/Shadow) onto a marked surface, revealing the hour as the [Sun](/wiki/Sun) traverses the sky.
+## See also
+- [Clock](/wiki/Clock)
+- [Timekeeping](/wiki/Timekeeping)
+- [Astronomy](/wiki/Astronomy)
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