SR: So the same way that building lights at night let you know that somebody's probably working there at any given moment, in a very real sense, there are biological sensors within a cell that are turned on only when that cell was just working.
SR: På samma sätt som lampor i husfönster om natten säger att någon förmodligen arbetar i just den stunden, på samma sätt, finns det bioloqgiska sensorer, i en cell som aktiveras endast när just den cellen nyss arbetat.