[JAKraig]

While the pendulum clock was marketed in the mid 17th century it was actually discovered that a pendulum had a constant moment in the very early 16th century by Galileo and others. He started work on a clock but got too busy to finish it.

Pendulum clocks were extraordinarily accurate. While my living room grandfather clock loses about 1 minute a month the most accurate pendulum clocks lose about 1 second every 12 years.

It is amazing what people did in the past that we forget about now and think of them as backwards.

[Telepathic Intruder]

Not many would understand but I so love being corrected. Galileo is uncredited in many ways.