Question

One of the longest running science experiments in the world stands in the 3rd floor lift foyer of the Department of Physics at the University of Otago, Dunedin, New Zealand. What is it?

Answer 1

A clock, built in 1864, which has never been manually wound
The clock was built by watchmaker and skilled mathematician Arthur Beverly in Dunedin and is still running. The clock is driven by temperature and atmospheric pressure variations. The bell, the dormant seeds, and the dripping pitch are also actual long-running experiments.