The sun dial worked during daylight, but how did people agree on what time it was at night before clocks were invented?

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[–] 17 points 2 years ago

THE Big Dipper's angle can be used to tell time at northern latitudes. It stays in the sky all night. I was told by a Blackfoot elder that they used it as a clock on clear nights.

The position changes with both time of night and time of year. Regular observers can tell time by the angle the constellation sits at.

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