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What interesting titbit have you learned recently?

Asked by rebbel (35550points) September 13th, 2017

Today I asked a colleague of mine a retired watch maker if he ever heard of clocks or watches that only make sound every two seconds, as opposed to every one.
He hadn’t.
But he told me something that I never heard of before, and I thought was really interesting.
Apparently, in the olden days, special barber clocks were made.
You guessed it: viewed in the mirror, they showed the time, going clockwise.
Meaning the clockwork was running anti clockwise.

Have you heard/learned about something (recently) that left you in awe?

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