Grab a pizza pan from Dollar Tree, but not for making pizza. Transform it into a modern DIY wall clock that will leave all your guests amazed and inspired.

These clocks are phenomenally good, with the best current cesium clocks reaching a precision of around a part in 10 16: that is, when it says one second has passed, that’s good to +/- 0. ...

News Published: 23 July 1932 Modern Developments in Precision Clocks Nature 130, 124 (1932) Cite this article ...