Cyano-acrylate glues (Super glues) were invented by accident. The researcher was trying to make optical coating materials, and would test their properties by putting them between two prisms and shining light through them. When he tried the cyano-acrylate, he couldn’t get the prisms apart.
According to the ceremonial customs of Orthodox Judaism, it is officially sundown when you cannot tell the difference between a black thread and a red one.
A ‘jiffy’ is an actual unit of time for 1/100th of a second.
