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: Na isti način na koji vam svjetlo u zgradi po noći govori da netko upravo tada radi tamo, isto tako postoje i biološki senzori unutar stanice koji su uključeni samo kada ta stanica radi.